maven executable option added
detect warnings in jshint

pass `jshint` the `--verbose` option to get 'W' or 'E' indicating
whether something is a warning or an error.

NOTE: this was tested with jshint 1.1.0 installed with `npm install
jshint`
Work with copy of g:syntastic_vala_modules list.
redraw! causes screen flicker in mvim too
recognize flake8 2.0 error output
Merge pull request #566 from Chronial/master

flake8 2.0 error parsing
python/flake8: add some backwards compat

make it match E and W for flake < 2.0
Merge pull request #564 from hdoshi/master

Use redraw in mvim
Merge pull request #563 from Lasall/vala-modules-copy

Work with copy of g:syntastic_vala_modules list.
Merge pull request #562 from joshuarh/jshint-warnings

detect warnings in jshint
jshint: add a comment version requirements
Merge pull request #559 from troydm/master

javac checker maven executable option added
Cleanup: a simpler and more efficient approach.
SyntasticChecker: extract out the highlight regex population code