Moved state document under '_local/' instead of '_design/'.

This is to ensure that it doesn't get replicated.
Merge branch 'release/v0.1' into develop
Merge branch 'develop' of https://github.com/ers-devs/ers into feature/ers-daemon
Allow for not creating a PID file
Added support for logging to syslog/systemd
Bugfix
Bugfix
bugfix
Merge branch 'feature/ers-daemon' into develop
Refactored replication document update system
Added debug messages for changes to replication docs
Bugfix: Quit GTK main loop properly if we catch SystemExit
Tear down peer list and replication relationships on exit
move EntityCache, import_nt, import_nt_rdflib to utils.py
update tests
test import_nt & import_nt_rdflib
delete db after testing
remove create_ers()
remove ERSReadWrite class
Quick fix to emulate deleted ERSReadWrite class