Decide database model

[jcechak]

Decide the final database model for all the needed entities and data. Especially, whether to use in-memory python object static data or populate a database on start-up.

in-memory python object pros:

• no additional loading to the database and transformation of data
• faster than disk read

cons:

• a bit awkward database scheme (not even 1NF)
• lot of working around managing the python objects

database populated on start-up pros:

• more intuitive work with the data
• Django and REST framework expect Django Models a lot
• localization though Django

cons:

• possibly slower access . requires conversion from python object do Django Model

[jcechak]

Every entity will be stored in the database and lazily loaded when needed by the core.