move library_fraction to be a user-submitted enum
Fix problems with mod_wsgi redirect and trackhubs.
add csv to extension mapping
Merge pull request #431 from ENCODE-DCC/1817-fix-output-type

move library_fraction to be a user-submitted enum
Add typical antibody lot Jest test

Also add associated test data
Merge remote-tracking branch 'origin/master' into 1713-antibody-lot