Merge pull request #63 from johnheroy/master

Refactor .travis.yml and package.json for running mocha with phantom, resolves #60
Add rudimentary gravity to particle class
Merge pull request #66 from bisutun/gravity

Add rudimentary gravity to particle class
Fix player disappearance bug; resolve #59
Merge pull request #67 from bisutun/player-bucket-collision

Fix player disappearance bug
Delete particles on collision with goalBucket
Merge pull request #68 from concreted/delete-particles

Delete particles on collision with goalBucket
stick spins but does not hit things downward
particles slope off of stick
particles slide off at a slope
Merge pull request #69 from NickStefan/minYparticles

particles slide off at an angle
add computer and overlay svgs
Merge pull request #71 from spencer48/adding-screen

add computer and overlay svgs
Add FlatUI to index.html & bower.json; include login form on home screen
Merge pull request #72 from bisutun/join-game-index-merge

Add FlatUI to index.html & bower.json; include login form on home screen
two players can bounce on same screen
Merge pull request #73 from NickStefan/otherplayer

two players can bounce on same screen
two players can see same particles
Merge pull request #74 from NickStefan/otherplayer

two players can see same particles
Add Spout class