integrated external library, not yet patched
imported third party package LICENSE
Integrated reverse regexp instead of random_string utils #50
patched rstr.xeger to use Crypto.Random safe functions
Updated README.md with commit pointer for third party integration
Merge branch 'master' into feature/receipt

Conflicts:
	globaleaks/handlers/files.py
restore unitTest with rstr integration
Merge pull request #78 from globaleaks/feature/receipt

Feature/receipt