fixed the related lccn bibs not getting pulled, fixes #248
removing a conditional not related to 248, refs #248
Merge pull request #394 from gwu-libraries/248_find_bibs_using_lccn

fixed the related lccn bibs not getting pulled, fixes #248 - both bibids correctly pull up the exact same holdings info, even with their slightly different (name form) bib metadata
fixed the 503 redirect issue, refs #278
fixed the json issue, fixes #278
cleaned up flake8 warnings
made isbn list lookup slightly more defensive, refs #278
Merge pull request #395 from gwu-libraries/t278-unicode-decode-errors

T278 unicode decode errors; cleaned up some flake8 warnings along the way.
fixed bad chars in isbn values using clean_isbn(), fixes #372
added more isbn tests for clean_isbn based on bad data from #372
removed 503 redirects, errors now stay on the same url; reconfigured logging to send page error email to admins; added logger for missing pycountry.db library; cleaned up 404 and 500 html templates, closes #393
Merge pull request #396 from gwu-libraries/t372-bad-isbn-values

fixed bad chars in isbn values using clean_isbn(), fixes #372
Merge pull request #397 from gwu-libraries/t393-log-errors-before-redirect

removed 503 redirects, errors now stay on the same url; reconfigured log...