Merge development into master.

[zujko]

This is a huge PR so opening this now. This PR is to merge everything from development over into master. This includes removing Celery, updating all packages, and other fixes.

[codecov-io]

Codecov Report

Merging #35 into master will increase coverage by 37.91%. The diff coverage is 59.77%.

@@             Coverage Diff             @@
##           master      #35       +/-   ##
===========================================
+ Coverage   30.97%   68.88%   +37.91%     
===========================================
  Files          32       28        -4     
  Lines         917      916        -1     
===========================================
+ Hits          284      631      +347     
+ Misses        633      285      -348

Impacted Files	Coverage Δ
pawprints/urls.py	100% <ø> (+30.76%)	:arrow_up:
petitions/tasks.py	0% <0%> (ø)	:arrow_up:
auth/auth_backend.py	29.72% <0%> (+29.72%)	:arrow_up:
profile/tests.py	100% <100%> (+68.42%)	:arrow_up:
petitions/tests.py	100% <100%> (+77.57%)	:arrow_up:
petitions/profanity.py	91.3% <100%> (+68.57%)	:arrow_up:
profile/models.py	95.83% <100%> (+16.66%)	:arrow_up:
petitions/models.py	90.62% <100%> (+0.3%)	:arrow_up:
send_mail/tasks.py	78.46% <100%> (+50.1%)	:arrow_up:
pawprints/settings.py	100% <100%> (ø)	:arrow_up:
... and 21 more

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[zujko]

Deployed and working in prod. Merging