Bumped DROID sigs to v72 and container sig v 20131112.
Map-reduce program to check whether gz files can be opened successfully
Merge pull request #8 from willp-bl/gzchecker

Map-reduce program to check whether gz files can be opened successfully
Merge pull request #6 from willp-bl/master

Update to latest code (in testing at the moment)
Merge branch 'master' of github.com:openplanets/nanite
Merged in changes from local modification.
Fixed test to use proper test file.
Revert changes
Merge latest changes (add Tika object) into code, and ensure globals are
private.