Completed the Create and Edit view for GradingSurveyGroup. Note that I've added a TODO to redo _editPost to give us kwargs. Would also get rid of hidden fields elsewhere. Reviewed by: Lennard de Rijk

# use glob syntax.
syntax: glob

*.pyc
*.zip
*~
.project
.pydevproject
app.yaml
build
tests/coverageResults
*,cover
tests/.coverage
*.git
.gitignore
.DS_Store
.settings