Version 3.5.0

Core Changes:

 * New option g:syntastic_sort_aggregated_errors (@lcd047)
 * New syntax highlight groups SyntasticStyleError and SyntasticStyleWarning (@kovidgoyal)
 * Lazy calls to the IsAvailable() functions (@lcd047)
 * New option g:syntastic_cursor_columns (@lcd047)
 * Various bugs have been fixed.

Syntax checker changes:

 * Added lint checker for R (@lcd047)
 * Added svtools checker for R (@lcd047)
 * Added scan checker for Haskell (@lcd047)
 * Added plutil checker for OS X and iOS plists (@lcd047)
 * Added tslint checker for TypeScript (@swook)
 * Added recess checker for LESS and CSS (@pixelastic)
 * Added bro checker for Bro (@JustinAzoff)
 * Added cabal checker for Haskell Cabal files (@ianbollinger)
 * Added sassc checker for SASS and SCSS (@lcd047)
 * Removed the rustc checker for Rust, now part of the Rust compiler package (@lcd047)
 * Added avrgcc checker for Arduino's ino and pde files (@lcd047)
 * Disabled the elixir checker by default, for security reasons (lcd047)a
 * Added clang_check and clang_tidy checkers for C and C++ (@bbannier)
 * Added phplint checker for PHP (@lcd047)
 * A number of checker variables have been marked as deprecated (@lcd047)
 * Various bugs have been fixed.