added z3950 class
some more cleanup of code
key name changes for Z3950 server settings
plugging in missing variables
some adjustments
most tests are getting passed with a very few missing records
taking out debugging messges that were pushed accidentally
latest changes
removed now redundant function get_gt_holdings
removed now redundant function get_gt_holdings
created a function for holding z3950 exceptions
added a travis file
corrected flake8 errors
replaced status Discharged wirh REcently returned, closes #286
added lccn numbers to find related titles, closes 248
added 020z to local_settings, closes #327
more flake8 cleanups, on views.py
resolved indenting change in .travis.yml