It's only the begining, I have to make a commit in order to be able
to fix the settings on master

Only syntax errors

Implements dyncode update for handled sites in lodelsites. solves #260

Now we are able to control EditorialModel load process at runtime
for lodelsites handled sites dyncode generation

Conflicts:
	lodel/buildconf.py.am.in

Introduce a new dependencie between lodelContext & multisite plugin

Now the context manager handles lodelsites paths

Thoses modification has two goals :
- make lodelcontext fit with the new FS organisation implemented by the
lodelsites datasource
- make the dyncode exposure more "flexible"

Note : no solution implemented for MONOSITE

Conflicts:
	lodel/plugins/lodelsite_datasource/fs_utils.py

At this point the loader in lodel/plugins/multisite/run.py is theorically
complete & correct. But some features are missing in order to be able
to test & debug it ( refs #275 ).

Conflicts:
	lodel/plugins/lodelsite_datasource/fs_utils.py

Now we are able to insert a lodelsite

no debug has been made on those piece of code

As a primary_key field has to be unique, added a check at DataHandler
instanciation to make sure a field set as a pk is not set as non-unique

Modified the shortname's DH attribute value from uniq to primary_key

Switched the shortname field's DH from Varchar to Regex