io.pytables: handle start/stop in remove and select_coords
I realized that the start/stop arguments to HDFStore.remove are ignored, so I have a patch to make them work as expected. Moreover I changed Selection.select_coords to also apply start and stop.

need:
- hook up to travis
- tests for new behavior (can go with test_remove, or create a new sub-below up2u)
- release notes

thanks!
 Thanks for your feedback. I can do this next this week. What exactly is needed to "hook up to travis", I did not find anything about this in the [deveolpoer page](http://pandas.pydata.org/developers.html).
 look at contributing.md in main pandas dir
 @cpcloud maybe add a link on developer page?
 @jreback @cpcloud I'd suggest copying the part on Travis wholesale.
 done: https://github.com/pydata/pandas-website/pull/24
 @wabu how's this coming?
 sorry. caught a bad cold, now added missing bits
 no problem!

fyi...you will need to rebase that master out of their

`git rebase -i upstream/master`
 @wabu can you rebase this?
 I did a rebase, the test is still failing on python 2.7, did not have time to debug this as i don't have a numpy/pytables/pandas for 2.7 around
 Travis builds the pr automatically

https://travis-ci.org/pydata/pandas/jobs/17820546
 look at #6177 for fixes
