- correction select2/typehead (sur bootstrap-typehead compatible bootstrap v4)

- construction des cartouches et des catégories
- construction des rectangles geomo

@TODO: remplir avec le contenu...

- ajouté main navbar sur home page quand loggé
- ajusté css
- mis dropdown en sombre
- ajouté lien pour site admin dans menu pour les membre staff

Missing intermediate commits with good comments....

Added tabs for 'edit' or 'review' mode. 
The Django view checks if the user may view
shared annotations for the anobj. The layout
react accordingly.

AnObj sharing and permission at Backend level
AnObjMgr in FrontEnd allow editing of the sharing
properties. Is able to liste shared AnObj

@TODO: fork on github and add my mod ifs
then set bower deps accordingly

Zoom is centered on the mouse pointer when done
whit the mouse wheel

Added button for 100% and fitAll in the TB, fixed
css too

Warning:
pnikolov-bootstrap-colorpicker was modified
I should fork it and do the modifications in 
an other repo...