fixed Issue 1538:Update Script setup-web2py-nginx-uwsgi-centos64.sh, thanks jniltinho
more secure sessions, now pass tests, thanks André Kablu
fixed  Issue 1539:user_groups are not updated during and after impersonation, thanks kmouts
added/removed files to hg/git, thanks Lightdot
removed unwanted print statement
no clickable headers for virtual fields, thanks Anthony
removed gql.py and added gae memcache incr
fixed Issue 1541:[REQ] support for dot=T('.') in IS_DECIMAL_IN_RANGE()
reverted new german translation
partial fix for issue 1531, disable validation in crud search
fixed issue 1527 with smartgrid (again), thanks ato.steil
resynced recent patches, sorry for the mess
avoid recursion in rewrite, thanks Jonathan
Rows.repr(), thanks Anthony