Updated Gemfile & readme; cleaned up GreedyAgent; updated error message in LocalDriver
Fixed bug with internal movement logic; clearer debugging output
Updated error message; fixed typo in wiki
'each' methods now return Enumerators
Renamed methods to more accurately reflect their return values
Added equality method for Tile
Shortened movement delay for web driver
Added option to run trials in parallel
Merge remote-tracking branch 'remotes/bobby/master' into simple-tree

Conflicts:
	Gemfile
	lib/gameboard.rb
tweaks to weights - need to fix monotonic metric