Add new docset: Apache Commons Collections
Fix docset name issues
Merge pull request #258 from facewhy/master

Add new docset: Apache Commons Collections
Processed docsets/Apache_Commons_Collections/Apache_Commons_Collections.tgz
Processed docsets/Apache_Commons_Collections/versions/4.0/Apache_Commons_Collections.tgz
Processed docsets/Apache_Commons_Collections/versions/3.2.1/Apache_Commons_Collections.tgz