Added raw parsers and some tests for data

This is basically Kevin Wilson's stream of consciousness. Please feel
free to move things around.
Added placeholder directory for data
Adding a .gitignore
Updated README with installation hint for people
Added support for short years

There were a few dates that were short years.
Added xlrd requirement
Made munging/ a package
Smarter date parsing in Pandas conversation loading
Make sure to return datetimes when parsing for Pandas
Fix the parsers to deal with commas in quotes
Simple function to find conversations involving suicide