move permission check of write access to repo groups inside a form. - it's runned via create/edit/fork forms - in case we have disabled repo creation, it will check root location write access for people that are not super admins, or have explicity create repo permission - in case there's a group value passed to form, it checks just admin or write access

syntax: glob
*.pyc
*.swp
*.sqlite
*.tox
Paste*.egg

syntax: regexp
^rcextensions
^build
^docs/build/
^docs/_build/
^data$
^\.settings$
^\.project$
^\.pydevproject$
^\.coverage$
^rhodecode\.db$
^test\.db$
^RhodeCode\.egg-info$
^rc.*\.ini$
^fabfile.py
^\.rhodecode$