Merge pull request #37 from vlinhart/master

minor changes
South reset
Old style apps are off by default
Fix: fee has been paid twice
Celery support, parmiko backend
Merge branch 'master' of github.com:creckx/pcp

Conflicts:
	requirements.txt
SSH over Paramiko works now
Paramiko + Celery should work fine now
GoPAY is not required dependency now. Use GOPAY = False in settings.
Tasklog migration, server desc. migration, server description in server list
Abbility hide server in core_server field
Typo fix