Minor optimisation related to syntastic_ignore_files.
Change 'call' to 'execute'

According to https://github.com/tpope/vim-pathogen
Merge pull request #658 from GarrisonJ/patch-1

Change 'call' to 'execute'
Coffee checker: "--lint" is now deprecated.
Clear loclist if there are no errors. Fixes #650.
Add a note about syntastic_always_populate_loc_list.  Formatting.
Minor update to the docs.
Formatting, again.
Relax parsing of version strings.
add oclint syntax checker for c/c++
OClint can check Objective-C files.  Cleanup.
Uniform naming for load guards.
Remove duplicated code.
New checker: text/atdtool.
Better handling of errorformat for OClint.
More errorformar adjustments for OClint.
Added checkers for Objective-C++ (mostly cloned from Objective-C).
Minor fixes.
Merge branch 'master' into gcc_refactor
Moved syntastic#gcc#GetLocList() to autoload/syntastic/c.vim.