Added log4j and openchord libraries.
Added config files required by openchord.
Added some apache common libs to make things easier. Switched log4j libraries. Updated openchord library (fixed bug: http://sourceforge.net/p/open-chord/bugs/9/). Added support for inserting/removing of files (more specifically, their md5 hashes) in the Chord network.
Cleaning things up.
Added logic for chord actions
Added logic for adding files
Added FilenameKey.
Changed Key implementation used.
Merge branch 'master' into oc_merge