Random cleanup
gitignore cover directory, require image saving package
dimensions
Dynamic downloading of covers

lazy downloading
management command to download undownloaded covers
changing up template tag calls for browse lists an details
some old class cleanup
download covers on deploy

we’ll want this, at least for initial deploys
bug fix for --clear option
Admin action for clearing covers on selected titles
Don't force cover downloading for DEV

Can be turned on optionally with LOCALIZE_COVERS setting
Turning off pool since @EvoTerra can't log in to admin.
Merge branch 'master' into feature/LocalCovers

* master:
  Turning off pool since @EvoTerra can't log in to admin.
Turning back on the pooler

admin problem is fixed, at least