syntastic 3.3.0

Core changes

• Overhaul of the checker infrastructure (@lcd047)
• More detailed debugging (@lcd047)
• New command :SyntasticSetLoclist (@lcd047)
• :SyntasticCheck now accepts multiple parameters (@lcd047)
• :SyntasticInfo now takes an optional argument (@lcd047)
• Option syntastic_quiet_warnings is now deprecated (@lcd047)
• New options syntastic_quiet_messages and syntastic_<filetype>_<checker>_quiet_messages (@lcd047)
• Speed optimisations (@lcd047)
• Various bugs have been fixed.

Syntax checker changes

• Added cppcheck checker for C/C++ (@lcd047)
• Added eslint checker for JavaScript (@maksimr)
• Added yamlxs checker for YAML (@colinmkeith)
• Added msgfmt checker for .po files (@syucream)
• Added limbo checker for Limbo (@powerman)
• Added racket checker for Racket (@2sb18)
• Added flex checker for Lex (@lcd047)
• Added bison checker for YACC (@lcd047)
• Added mxmlc checker for ActionScript (@andyearnshaw)
• Added cgc checker for GLSL (@jrahm)
• Added rstcheck checker for reStructuredText (@myint)
• Added gotype checker for Go (@neeee)
• Added haml_lint checker for HAML (@sds)
• Rework of the python checker (@lcd047)
• New command :SyntasticJavacEditConfig for javac (@troydm)
• Added language_check grammar checker (@myint)
• Added jscs checker for JavaScript (@lcd047)
• Various bugs have been fixed.