* Renamed many add-* functions to set-* functions.
* Implemented the set/get functions for player-game-stats (using dual tables).
* Implemented set/get of player career stats and team cumulative stats.
Merge branch 'master' of https://github.com/shunenchen/CSE218-2013-WINTER

Conflicts:
	src/hgm/db/core.clj
Merge branch 'master' of https://github.com/shunenchen/CSE218-2013-WINTER