modified m and test.js to exit with exit codes.
travis config file
Make set.js use correct boolean singletons.
Make pow() handle large integers as longs.
added simple 'document' module example
Rename m to m.py and change Python version to 2.7
Merge pull request #108 from mrshu/master

Added simple 'document' module example
Merge remote-tracking branch 'rixner/master'
Update dist.
Add Sk.builtin.checkBool function.
Some turtle methods were returning old style javascript numbers, not numbers constructed to be Python objects.  See the error that is can cause in #110
rebuild dist
Merge branch 'master' of github.com:bnmnetp/skulpt
typo
Fixing situation when assert has no explanation
Merge pull request #111 from mrshu/master

typo
Merge remote-tracking branch 'rixner/master'
Change goog.asserts to a SystemError exception.

When running with the compiled Skulpt, goog.asserts is not available,
so internal errors yield a mystifying message.  Hopefully, this will
make things fail in a more understandable way.
Make group() method in re module accept no arguments.
Fix Sk.misceval.objectRepr to print 'inf' and '-inf' correctly.