NSFW/SFW filter added.  SFW is default.
Merge pull request #1 from jpgdump/master

Minor java cleanups, switch votes to use a VoteType enum
Merge branch 'master' of https://github.com/aschuster3/JPG-Dump-Mobile
I accidentally mixed up the vote buttons.  Now fixed.
Added convenience loggers and centralized the cache directory finding