Allow the LDAP username/password to be blank
Basic logging to logstash and console
Update README about ldap
Tests for session clearing. Remove references to the old hit counter session clearer. Add setup.py extras
Merge branch 'kfarr2'

Conflicts:
	README.md
	arcutils/__init__.py
Set default level to INFO. Add mail_admins for errors
Merge pull request #1 from PSU-OIT-ARC/master

Merge PSU-OIT-ARC:master