Auto accept previous year units

[Incompleteusern]

Fixes #300 #318.

Automatically accepts petitions of a user that has students of another instance with that unit unlocked.

[vEnhance]

Some changes requested:

1. There's some random print statements that need to be fixed
2. I think this is an O(n) query where n is the number of times you've done OTIS, but it really should be O(1). Django should support something like Student.objects.filter(user=student.user, curriculum__<something>=unit), I don't know off my head but I'd be shocked if it didn't exist.
3. Needs unit tests.

[vEnhance]

thanks, can we actually just delete the stale lines rather than comment them out

[vEnhance]

still waiting on unit tests here

[jatloe]

is this dead

[Incompleteusern]

I don't feel like working on this right now. I might finish unit tests when this OTIS semester is over.

[coveralls]

Pull Request Test Coverage Report for Build 10127134543

Details

• 28 of 28 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 91.779%

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Totals
Change from base Build 10125073972:	0.02%
Covered Lines:	6757
Relevant Lines:	7210

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💛 - Coveralls

[Incompleteusern]

Unit Tests should be done.

[chessisdabest]

Wonderful timing for the new year...