Added test suite for MLB.
Moved README to top level
Reorganized all utility scripts to be run from launcher.py.

There were problems getting visibility to shared.dfs_constants when the
scripts were being run from within the nba directory, even though it
could be imported just fine.
Added MLB and NBA salaries for 4/2/2014.
Code cleanup
Added test case HTML files for pitcher game logs and details season pitching stats.
Wired in MongoDB.

Players are now looked up in Mongo prior to doing their scraping, and
their dictionary is passed into the scraper (if we get a hit).
Otherwise, a new dictionary is created with the player_id value and we
use that until it’s time to save.