Update the DB model and bring back storing the version info at the project level
project_id is an integer not a string
Store the versions of a project in its own table
Set the relation between Project and ProjectVersion
Drop the version column from the projects table
Rename the application from cnucnuweb to anitya
Store the different backends in their own table and cross-reference it in the Project table
Adjust the imports for the new name of the project
Add a classmethod to retrieve all backends stored in the DB and fix a typo in the Project class
Move the version_url and regex fields to the ProjectForm
Adjust the ProjectForm to include the drop-down list of all the backends
Simplify the DistroForm
Rename and adjust the sample file for the name change to anitya
More adjustment to the new name: anitya
Fix imports and doc-string in the unit-tests
Fix getting the DB session
Fix imports in the forms
Fix relation between the Project and the Backends tables
Create a backend lib module that contains the model
Add anitya.lib.exceptions with all the exceptions of the application