Revise Job & Requirement relation

[Anton Komarev]

Need to revise relation between Job & Requirement entities:

• is Requirement belongs to Job?
• can Job accept null instead of Requirement?

It looks like I'm missing one more entity which links Job & Requirement entities.

[Anton Komarev]

There will be other type of jobs. For example job to add new Repository. So I started to think that we need to add Jobable term.