Integrate storage in Journal at init and end of the activity

I'm sure you'll love it: TurtleJS now store automatically current blocks in Sugar/Sugarizer Journal at end and reload it automatically at init ! Bonus: current language is saved too.

I had to reorganize a bit the initialization cycle of the activities: first activity.setup, then appInit, then domReady.
There is still a refresh issue when coming back from Journal - specifically with Flow blocks. May be you could have a look on it.