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.

The shared annotations list respect the publishing
level defined by the user (owner or public)

Added the possibility to allow or not the members
of an AnObj to publish their annotations for
the other members. Read/write support from
AnObjMgr

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

a field image_url added to AnObj
Image is loaded by a img tag with "crossorigin"
attribute set to "anonymous".
The paper.Raster object is build using the img tag
instead of the direct url. Also for local images.

Added feed back if no images to display
Added Loading... feedback

Fixed FontSize popover css (update bootstrap-spinedit lib)
Texts can be resized with the select tool by drag-n-drop

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

Possible to drag and resize with both shape and
select tool. Shift-Drag handles to resize and 
preserve shape ratio

small changes in shape
shift-key while resizing will keep ratio

Redirection after removing current image is
no more absolute

Initial color of arrows should be fixed

Arrow are now PlacedSymbol, needed to fix some 
getters and setters ; serialization too.

Kept old arrow mode under the name "arrow1"

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...

Functions for Thumbnail creation and borders are 
now in adim_app.utils

Thumbnail creation and border are called at view
level from adim_app (no more in models)

Thumbnail size in settings, no more hardcoded