Merge pull request #29 from t-yuki/quotedresources-#24

Quotedresources #24
Add rubygems source as suggested by bundle, now works out-of-the-box
Merge pull request #30 from zerodeux/patch-1

Add rubygems source as suggested by bundle, now works out-of-the-box
Add no_underscore_emphasis option.
Redmine 2.2 compat patch.