DDF-592 update documentation to require Java 7
Merge pull request #8 from mplachec/master

DDF-592 update documentation to require Java 7
DDF-464 - Cleanup (converted null/empty check to use Apache Commons StringUtils)
DDF-596: More ddms removals
DDF-599: Added filter and test to Installer module
DDF-599: Fixed checkstyle errors in test
DDF-599: Made debug statements more informative
DDF-599: Filter was blocking a resource
DDF-599: Beefed up tests to test more cases