bug fix:  introduced syntax error in last commit.
New build with bug fixes
Merge branch 'master' of https://github.com/bnmnetp/skulpt
completed str.lstrip()
Merge pull request #68 from pbharrin/master

completed str.lstrip() with tests
Thanks!
Merge branch 'master' of https://github.com/bnmnetp/skulpt
Canvas3D and Canvas2D separation.