lookup_type is deprecated in favor of lookup_expr

[atombrella]

assertEquals is deprecated in favor of assertEqual

app_name is a required keyword as of Django 1.10

[atombrella]

These are different warnings that I found when running the test suite with the -Wall flag (I verified that the tests run both on Python 2 and 3). I don't know if each replacement should be a separate commit or if this is acceptable.

[codecov-io]

Current coverage is 91.23%

Merging #4259 into master will not change coverage

@@             master      #4259   diff @@
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  Files            52         52          
  Lines          5776       5776          
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
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  Hits           5270       5270          
  Misses          506        506          
  Partials          0          0          

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[lovelydinosaur]

Good stuff, thanks!

[xordoquy]

provided we use py.test, we should just get rid of assert**** and simply use assert