* update project link
* update copyright line (include 2018)

* update to Django 1.11.5
* explicitly list all dependencies so we can `pip install --no-deps`
* layout and config fixes from deployment tests

* include links to code
* clean up README, COPYING and associated files

* add rabbitmq and ssh/openvpn instructions to README
* correct celery worker/beat invocation
* add error_message to limitmonitor.external_credit (store the message when a credit attempt fails)
* warning but allow missing host key (ssh connection to openvpn server)
* syntax and other minor fixes

* clean up ldapregister templates
* mention external resources in README

* also tweak README URL and homepage links

* expand setup instructions with installation details
* update config examples and home page links
* reorder requirements to match `pip freeze` output

* update registration templates to use latest Purist layouts
* update registration templates to use crispy forms

* declare ldap-model lookup values as settings
* update all methods used by `createsuperuser`
* document makemigration workaround
* add django-ldapdb to requirements