remove dependency on storify from controllers/general.py

[charmander]

• adjustments as recommended in code review

Single rebased commit from #744.

[charmander]

I think this could benefit from named arguments, and backid/nextid being parsed in advance.

[sl1-1]

Is this what you were thinking? https://github.com/sl1-1/weasyl/tree/remove-storify-from-controllers-general
Not sure if there is a way to change a pullrequest, or if you should pull the changes to your branch? :)

[kfkitsune]

LGTM, as far as I can ascertain!

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@8057229). Click here to learn what that means.
The diff coverage is 5.88%.

@@            Coverage Diff            @@
##             master     #797   +/-   ##
=========================================
  Coverage          ?   67.70%           
=========================================
  Files             ?      157           
  Lines             ?    12474           
  Branches          ?        0           
=========================================
  Hits              ?     8446           
  Misses            ?     4028           
  Partials          ?        0           

Impacted Files	Coverage Δ
weasyl/controllers/general.py	47.36% <0.00%> (ø)
weasyl/search.py	80.74% <20.00%> (ø)
weasyl/banner.py	37.50% <0.00%> (ø)
weasyl/test/test_folders.py	100.00% <0.00%> (ø)
weasyl/controllers/detail.py	50.58% <0.00%> (ø)
weasyl/test/useralias/test_set.py	100.00% <0.00%> (ø)
weasyl/controllers/interaction.py	31.40% <0.00%> (ø)
weasyl/controllers/routes.py	100.00% <0.00%> (ø)
libweasyl/libweasyl/models/helpers.py	64.32% <0.00%> (ø)
weasyl/macro.py	77.77% <0.00%> (ø)
... and 149 more

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