added glsl checker
added ability to add extra arguments
removed echo
Fix args in actionscript/mxmlc checker
New checker for Go: gotype.
Add rstcheck

It checks reStructuredText like "rst2pseudoxml.vim" does, but
additionally rstcheck checks syntax of code blocks within RST files.

https://github.com/myint/rstcheck
Add haml-lint syntax/style checker

Add a checker `haml-lint` (https://github.com/causes/haml-lint).
Merge pull request #921 from andyearnshaw/actionscript-mxmlc

Fix args in actionscript/mxmlc checker
Add ActionScript to the list of supported languages.
Bit rot: jslint no longer accepts "--undef".  Minor cleanup.
Set clang as the default C/C++/Obj-C/Obj-C++ compiler if gcc is not found.
Merge remote-tracking branch 'glsl/glsl'
Cleanup the glsl/cgc checker.
Minor fix: use clang++ instead of clang for C++.
Merge pull request #916 from myint/rstcheck

Add rstcheck (reStructuredText code block syntax checker)
HTML validator and w3: allow user to set the path to curl.
Merge pull request #919 from neeee/gotype

New checker for Go: gotype
Minor cleanup for gotype.
Merge pull request #922 from sds/add-haml-lint-checker

Add haml-lint syntax/style checker
Minor cleanup for haml_lint.