Merge pull request #28 from xferguson/master

Added in other Travis testing files
Added in testing instructions to the readme.
Merge pull request #29 from jakerose27/master

Added in testing instructions to the readme.
Minor formatting for the readme
Merge pull request #30 from jakerose27/master

Minor formatting for the readme
Update README and gitignore
gitignore is now working
Merge pull request #31 from sloria/fix-gitignore

Fix gitignore and update README
Added refresh hints to try and reduce expand/collapse filtering times
Merge branch 'master' of https://github.com/CenterForOpenScience/HGrid