Edit SurveyRecord model to not make use of different Survey property for each subclass. This does mean that a simple query needs to be constructed by hand whenever you want to query for every SurveyRecord for a specific Survey. However the naming is now the same over each SurveyRecord and it fits well into the rest of the design of Melange.

# use glob syntax.
syntax: glob

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