Draw

Add draw directive. 

Wait for #1166 before merge but the last commit is ready for review.

- [x] Merge #1166 
- [x] Missing Images
- [x] Missing translations

@cedricmoullet's mail comments:

- [x]  It should be possible to deactivate all functions by clicking on it. It's not very comfortable to have ALWAYS an active function
- [x]  Edit: the label should appear only when a label is selected (or in general, the settings should appear only when a feature is selected)
- [ ]  The text should be printed like it's on the screen: WYSIWYG
- [x]  As David mentionned, the draw should stay, also if the tool is deactivated
- [x]  FR translation for the tool should be "Dessiner"
- [x]  When edit mode is activated, it should be possible to zoom in / zoom out