[Ml-yokadi] utils strike back

[Sébastien Renard]

Hello,

I know you won't like it, but I have been forced to create a utils.py to 
factorize the currentVersion and YokadiSharePath stuff for the following 
reasons :
- it was bloated yokadi.py (well, not a strong reason, I admit)
- code was needed by db.py module and I don't want to make circular import 
(that's the real one).

Of course, I would be very happy to find another name, but for instance this 
could not fit into either dbtils, dateutils or parseutils.

BTW, update scripts are now included into yokadi package and work outside 
source tree.

I'll push that code tonight.
-- 
Sébastien