Minor cleanup: wrap the main commands in their own functions.
ghc-mod: the pylint way of handling versions is way cool, man.
First step towards exposing an API.
Try to detect filetypes abducted by Eclim.
Try to detect checkers disabled by YouCompleteMe.
Slightly more meaningful messages for checkers disabled by Eclim and YCM.
Bug fix: make sure directory returned by syntastic#util#tmpdir() exists.
Clisp: workaround to remove ciompiled files.
Scss-lint: syntax errors should have subtype syntax (@sds).
Ruby: add reek style checker
Reek checker: cleanup.
Remove the avrgcc checker for Arduino.

According to #1173: "When the Arduino IDE compiles arduino files,
they're not just passed to avr-gcc -- there's some preprocessing that
happens".  This is the template problem, and syntastic doesn't have a
solution for it at this time.
Dartanalyzer can now return exit code 3.
Shut up vimlint.
FAQ: add a note about HTML Tidy for HTML5.
README: rephrase.
Discourage people from looking at the sources for user docs.
make golint report warnings instead of errors
Merge pull request #1255 from vincent-petithory/golint-warning

Golint: report warnings instead of errors.