Merge pull request #63 from differentmatt/master

Use published Filbert package instead of tarball
Release 0.2.7
Removed original source strings from transpiled code, as they're not needed with proper ranges.
Release 0.2.8
Added iota dependency
Updated Io stub
Fixed issues with Io parser only having partial source range information
Additional transforms following compilation: made the last statement return a JS primitive value
Io tests
Added OOP usage test
Updated iota version
Added some hard execution limit options. Fixes #32.
Release 0.2.9
Merge pull request #72 from dariusf/io

Io integration
Release 0.2.10
Release 0.2.11
Harsher builtin protection, a bit of cleanup. Fixed #74, I hope.
Release 0.2.12
Fixed some builtin functions not being available any more, oops.
Release 0.2.13