Massive layout/Card Class Change

Layout modified to intended layout
Card class integrated (mostly) - modification needed
Functionality temporarily suspended - will need to be added back in,
primarily through modifying calc.java class
Added snapping effect back in
Minor Changes

-Made answer card visible
-Readded setters and getters in class numbercard
answer card drag and snap
one click set back on cards in workspace
Merge branch 'Roland-Layout' into develop