Made Gruntfile compatible with Windows.
Added support and tests for `if-not` and `when-not`.
Removed some accidental whitespace changes.
Update to latest versions of dependencies.
Merge pull request #8 from Driphter/windows-grunt-compatibility

Made Gruntfile compatible with Windows.
Merge pull request #9 from Driphter/if-not_and_when-not

PARSER: add support for if-not and when-not forms.
Update generated files in lib/ and demo/ corresponding to pull request #9.
0.2.0