Merge branch 'origin/bill'

* refs/remotes/origin/bill:
  checkpoint
  tweaked launch
  prepping for notebook reintegration
adding new prims
undoing my changes before merge
have to commit before i can pull again
Merge branch 'bill' of https://github.com/zot/Leisure.git into roy
adding floor prim to test
beefed up prim math functions
Merge branch 'origin/bill'

* refs/remotes/origin/bill:
  fixed error in cons.toString(), repl properly indicates when processing an IO monad, allow negative and floatingpoint numbers, grouped empty lines with emptyLinePat,

Conflicts:
	core/runtime.coffee
	lib/browser.js
	lib/browser.map
	lib/runtime.js
	lib/runtime.map
Merge branch 'origin/roy'

* refs/remotes/origin/roy:
  beefed up prim math functions
  adding floor prim to test
  have to commit before i can pull again
  undoing my changes before merge
  adding new prims