Fix: Mutable argument in pynag.Utils
Fix: Mutable default argument in eventHandlers
Fix: Better error message when using invalid livestatus syntax

Fixes #85
Fix: GitRepo().get_uncommited_files() when files have been renamed

Previously it would report filename as "old_file -> new_file" but now only return "new_file"

Fixes: #87
Merge branch 'master' of github.com:pynag/pynag
Fix: Search by shortname breaks on invalid config

Fixes #92