Adding contact nodes on all obstacles
Merge branch 'master' into vincentBranch
Adding Tuan's update: Coins
scoring sprite nodes switched to sknodes
added vincent's pull request manually
test commit
Merge branch 'master' into vincentBranch
Small pull from upstream master
Fixing scoreNode not passable issue. Set collisions to be true for all but coin and scoreNode
Changed benchScoreContact to be a SKNode() like before.
Merge pull request #27 from vlee90/vincentBranch

Fixed collision with scoreNode/coin issue
add menu files
add comment
-Fixed crane hook, chain, and beam. Added pylon, w/ physics.
-Added '5MinuteWaterBreak' sound-bite. We HAVE to add this!
unable to click on replay button so I put the game over screen code back to game scene.
removed redundant sound on off image files
-Cleared white space.
Merge pull request #28 from samwong000/master

Tidied up the menu code
fixed some bugs