Update docs.ecosystem.api.pandasdmx
I am the author of pandaSDMX and contributed the section about two years ago. It is outdated and has become misleading. 

 - [ ] tests added / passed
 - [ ] passes ``git diff upstream/master --name-only -- '*.py' | flake8 --diff``
 - [ ] whatsnew entry

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=h1) Report
> Merging [#16172](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/a7a0574a0bcb8a4c65ed7f5006972e24f90ae3df?src=pr&el=desc) will **increase** coverage by `0.02%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16172/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #16172      +/-   ##
==========================================
+ Coverage   90.86%   90.88%   +0.02%     
==========================================
  Files         162      162              
  Lines       50819    50819              
==========================================
+ Hits        46177    46188      +11     
+ Misses       4642     4631      -11
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.66% <ø> (+0.02%)` | :arrow_up: |
| #single | `40.33% <ø> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/common.py](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvY29tbW9uLnB5) | `90.68% <0%> (-0.35%)` | :arrow_down: |
| [pandas/plotting/\_converter.py](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb252ZXJ0ZXIucHk=) | `65.35% <0%> (+1.81%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=footer). Last update [a7a0574...ec3801a](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=h1) Report
> Merging [#16172](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/a7a0574a0bcb8a4c65ed7f5006972e24f90ae3df?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16172/graphs/tree.svg?token=eZ4WkYLtcO&src=pr&width=650&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #16172      +/-   ##
==========================================
- Coverage   90.86%   90.86%   -0.01%     
==========================================
  Files         162      162              
  Lines       50819    50827       +8     
==========================================
+ Hits        46177    46183       +6     
- Misses       4642     4644       +2
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.64% <ø> (-0.01%)` | :arrow_down: |
| #single | `40.33% <ø> (-0.01%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/common.py](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvY29tbW9uLnB5) | `90.68% <0%> (-0.35%)` | :arrow_down: |
| [pandas/compat/\_\_init\_\_.py](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree#diff-cGFuZGFzL2NvbXBhdC9fX2luaXRfXy5weQ==) | `62.22% <0%> (-0.11%)` | :arrow_down: |
| [pandas/core/generic.py](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ2VuZXJpYy5weQ==) | `91.63% <0%> (ø)` | :arrow_up: |
| [pandas/core/config\_init.py](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvY29uZmlnX2luaXQucHk=) | `94.52% <0%> (+0.23%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=footer). Last update [a7a0574...d97e006](https://codecov.io/gh/pandas-dev/pandas/pull/16172?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 Thanks. I removed the list of data providers to make it as succinct as
the other project descriptions.


Am 01.05.2017 um 13:53 schrieb Jeff Reback:
>
> *@jreback* commented on this pull request.
>
> ------------------------------------------------------------------------
>
> In doc/source/ecosystem.rst
> <https://github.com/pandas-dev/pandas/pull/16172#discussion_r114119063>:
>
> > @@ -175,11 +175,28 @@ This package requires valid credentials for this API (non free).
>  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  pandaSDMX is an extensible library to retrieve and acquire statistical data
>  and metadata disseminated in
> -`SDMX <http://www.sdmx.org>`_ 2.1. This standard is currently supported by
> -the European statistics office (Eurostat)
> -and the European Central Bank (ECB). Datasets may be returned as pandas Series
> -or multi-indexed DataFrames.
> -
>
> I would prefer just a link back to the package readme where you can
> update.
>
> —
> You are receiving this because you authored the thread.
> Reply to this email directly, view it on GitHub
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>

 Thanks, I'll have to check out your project next time I use eurostat :)