added backgounds for buttons and units
Move units to faction class
Merge branch 'master' of http://github.com/jbtyson/cis580-rts into gui
start convert to Factions array
More convert to Factions array
inheritance and faction
more inheritance
temporary disable command panel image render b/c no img causes error
Merge remote-tracking branch 'origin/factioning' into Units

Conflicts:
	rts/src/rts.js
	rts/src/units/hoplite.js
Updated inheritance
Merge branch 'Units' of https://github.com/Jbtyson/cis580-rts into Units