Merge pull request #12 from ryanstorberg/master

changed sprite1 to bear; horizontally and vertically centered game screen
Merge pull request #13 from ryanstorberg/master

enabled sprite mirroring; spawned bear in appropriate starting location;...
Merge pull request #14 from ryanstorberg/master

bug fixes
fixed bugs
Merge branch 'master' of github.com:woolly-bear-caterpillars-2014/polar-bear-panic