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
Merge pull request #75 from concreted/spout-class

Add Spout class
otherplayer now inherits methods from player

this saves a lot of repeated code.
unfortunately otherplayer can only inherit methods and
not properties from player; trying for both breaks