Consolidate all the various models into 1 model

[ryanmerolle]

It would be nice to convert all the various models into 1 model called documents. Then you would just need to "activate" new model relationships as you see fit instead of creating a new model for each model you want to add documents to.

I do something similar in my unreleased plugin, which @DanSheps pointed me to.

• GenericForeignKey in models
• GenericRelation in models
• Constants to filter the objects to relate

Adding documents to new models would just require an updated to the constants and a new GenericRelation.

When I get some down time, I'd be able to help.

[maciejopalinski]

this needs more attention, this single feature would fix most of the open issues