Log object creation/update/deletion in django admin log
Add a view to list actions history
Add a tab with actions history in detail view
Make actions history optional
Fix syncdb
Add creator, authors and last author in trackinfo fragment
Show time since for action history
Test actions history
French translation
Merge remote-tracking branch 'origin/develop' into action_history

Conflicts:
	mapentity/models.py
PEP8/pyflakes
Merge pull request #44 from makinacorpus/action_history

Action history (fixes #2)