Update wnf.py

#!/usr/bin/python > #!/usr/bin/env python for *bsd compatibility
moved directory structure
updated paths
__session_cache removed and introducted memcache for caching
removed archive.py
dont save duplicate files
validate for max users only when enabling a user
Merge branch 'master' of github.com:webnotes/wnframework into 1209
profile.py: fixed - logout disabled user
Merge branch 'master' of github.com:webnotes/wnframework into 1209
profile.py: fixed - logout disabled user
profile.py - do not allow rename of Administrator, Guest and on rename, change user in __Auth table
Merge branch 'master' of github.com:webnotes/wnframework into 1209
added voucher import tool
fixed voucher import tool
fixed nested set model - group move, deletion
commented sys path in nestedset
fixed nested set model - group move, deletion
updated messages
updates to form comment (post on enter) and global defaults