fixed Array.prototype.indexOf polyfill
use lib.indexOf instead of Array.prototype.indexOf
Added ability to add/customize globals with: addGlobal(name, func)
Fix undefined variables throwing exception with length filter
update browserfiles and commit `set` tests
Merge pull request #239 from garygreen/feature/customize-globals

Added ability to add/customize globals with: addGlobal(name, func)
Add support for 'in' test.
fix using `include` and a few other forms within macros (fixes #159)
relax parseTemplateRef and allow any arbitrary expression (fixes #269)
Merge pull request #248 from garygreen/fix/length-undefined

Fix undefined variables throwing exception with length filter
also relax `import` to take an expression
clarify `env.addGlobal` method
prep for 1.0.6
fix versioning in browserfiles, bump to 1.0.7
Merge remote-tracking branch 'origin/master'
rebuild browserfiles
add test coverage using istanbul
fixed urlize period removal
fixed urlize period removal
fixed urlize period removal