Attempt to add Travis CI support

[jakirkham]

How this works.

• Try to handle Python and related dependencies with conda. Makes it really easy to install numpy and the sort. Also, uses binaries so it is really fast (no build time). Usually, has recent versions.
• Uses a Java language environment. It is needed for some things in here anyways. Also, the Travis Python environment would be replaced with conda's so we don't care about it.
• Use pip to install the latest python-javabridge. Easy to do. Likely what someone will do when installing themselves.
• Builds the sphinx docs with the html target. Just verifies the docs can still be built. May provide elucidating warnings in-case somebody isn't following correct syntax.
• Provides some coverage setting. Could be used to report to coveralls.io given some tweaks to python-javabridge.

[LeeKamentsky]

👍 looking forward to it, thx.

[jakirkham]

If you setup coveralls now, I can enable support for it in this PR. I can some default settings for it, but you may wish to fine tune it further.

[jakirkham]

Alright, this works. I'm rolling back the coverage support during testing as it will require a change to python-javabridge to support it. I left the original commits in there so if you want to take a look at how it would of worked you can.

[LeeKamentsky]

Nice. @0x00b1 what do you think? It runs the unit tests - I like. IMHO - getting the travis build status is the big win we wanted. Code coverage would be nice, but we wouldn't act on the results for a while at least.

[jakirkham]

There could be a way to workaround this using coverage run ( http://coverage.readthedocs.org/en/latest/#quick-start ). Though nose already supports coverage with a simple option. Its just a matter of getting python-javabridge to allow for that option. So, it shouldn't be hard, but I didn't want to hang this up over getting those set up and in sync.

[jakirkham]

Also, it might be worth build the docs, but I'm not quite sure how you do that for your project. I tried running make html inside the docs directory, but got several tracebacks regarding a failure to import javabridge, which was installed in the environment. So, it may take some more playing around.

Scratch that. It was picking up the wrong sphinx.

[jakirkham]

Added a doc building step, as well.

[jakirkham]

Tried to better lay out my rational for my design choices above.