Ignore python cache files in NERDTree

in addition to swap files
Disable puppet-lint arrow-alignment check

I don't want to add diff noise just realigning vars.
Update configuration for newer syntastic
Ignore dir listing cache files
Highlight empty comments in readmes
Give tabs a width of 2 in Go
Highlight NOTE and EXPERIMENTAL in conf files
Highlight css vendor prefixes
Redefine ini comments to not include #

since it isn't always recognized
Set comment string to # in readme