Add a grade field to the Grading Project Survey form. This also takes care of validating and transforming the data into True(pass) or False(fail). GradingProjectSurveys are hereby working for developers. 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