Add support for SASS files
Lua comments
Fixed escaping of comment type regex

Was getting warnings regarding proper escaping of characters (i.e. -- in .hs)
Fixed regex to escape characters and also made regex more explicit to avoid potential problems
Added extra checking for input files

Was failing if directory passed to -f flag, added extra check
to make sure a file is really a file before parsing
Merge branch clawfire/patch-2

Merged pull request #209 from clawfire/patch-2
Merge branch mvader/patch-1

Merge pull request #211 from mvader/patch-1
Updated for v1.4.2

Updated version.rb and Gemfile.lock for v1.4.2 gem release