Added several models related to the GHOP workflow. These models will form the base of the GHOP infrastructure together with the already commited task model. 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