No longer supporting rcov for development (it didn't see much use, anyway). Plus, ignoring +bin+ so Bundler can enjoy playing there.
Accomodating for style_index missing in some Excel files
Version bump to 2.3.2
Regenerate gemspec for version 2.3.2
Issue #87: Moving Writer functionality to OOXMLTopLevelObject
Merge branch 'master' of github.com:weshatheleopard/rubyXL
Merge branch 'master' of github.com:weshatheleopard/rubyXL into moving_writers

Conflicts:
	lib/rubyXL/workbook.rb