adpating app to heroku
added psycopg2 to requirements
explicit dj heroku requirements
testing new configuration
Removed django settings default db
default db settings
allow path line as blank for serializer validations
allow postit test as blank
Revert to 3470e010c5aeba1ef3c07b4e854c3133d5593c77
Merge remote-tracking branch 'upstream/master'