Remove unnecessary check

This fixes a regression with case statements from commit
0c4190c1c88e25fcd2994709da8c27f22dd697ec.

Turns out, `s:Match` already handles the string-or-comment check, and in
a much smarter way, so the abovementioned commit only needed to update
the syntax groups checked for being a "string".
Adjust indenting after lines like "],"

This is already taken care of for block endings, but needs to be done
for arrays and round-brace groupings.
Watch out for indent keywords with hanging brackets

This way, a def or class ending in a multi-line bracket group would
indent its body correctly.
Remove debugging variable
Experimental support for .ruby-version

I do not want to head down the road of supporting every Ruby version
manager under the sun, but I think .ruby-version can be considered a
standard, at this point.
Fix 'tags' in the default Ruby case
Highlight Ruby 1.9 overloadable operators
Fix error when editing virtual files

Closes #131.
Merge branch 'master' into add_balloons_option