DOC: ecosystem.rst: QtPandas

 - [x] closes draperjames/qtpandas#36
 - [0] tests added / passed
 - [-] passes ``git diff upstream/master --name-only -- '*.py' | flake8 --diff``
 - [-] whatsnew entry

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=h1) Report
> Merging [#15813](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/da92411485d7fbe766d12e5a78910ff7aaa45c12?src=pr&el=desc) will **decrease** coverage by `0.02%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/15813/graphs/tree.svg?width=650&src=pr&token=eZ4WkYLtcO&height=150)](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #15813      +/-   ##
==========================================
- Coverage   91.01%   90.99%   -0.03%     
==========================================
  Files         143      143              
  Lines       49387    49387              
==========================================
- Hits        44948    44938      -10     
- Misses       4439     4449      +10
```


| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/common.py](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvY29tbW9uLnB5) | `90.96% <0%> (-0.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.56% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15813?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/15813?src=pr&el=footer). Last update [da92411...a97084e](https://codecov.io/gh/pandas-dev/pandas/pull/15813?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments). Thanks!

On Mon, Mar 27, 2017 at 8:08 AM, Jeff Reback <notifications@github.com>
wrote:

> Closed #15813 <https://github.com/pandas-dev/pandas/pull/15813> via
> 056c0a6
> <https://github.com/pandas-dev/pandas/commit/056c0a666f0cb83ee15e793376361b916e7b364c>
> .
>
> —
> You are receiving this because you authored the thread.
> Reply to this email directly, view it on GitHub
> <https://github.com/pandas-dev/pandas/pull/15813#event-1016630388>, or mute
> the thread
> <https://github.com/notifications/unsubscribe-auth/AADGyyAzpIUO1CCOCgkkdvbUjcAkEzIDks5rp7TRgaJpZM4MpzIS>
> .
>
