Converted symbols to strings in BRACES
Fixed outdated doc
Use secure rubygems and bundle updated
Added #each

For some reason, I used to be able to call #each on a Style object (not
sure why), but cannot in 2.0.0-p0.
Removed unnecessary #to_s call
Use string file names instead of symbols
More symbol file name -> string conversions
Added support for Ruby 2.0.0-p0.  Closes gh-133

Also noticed that indentation for multi-line embedded expressions
wasn't being handled, which seems related to gh-123.  Will add tests
for this...