Sticky Notes

# Collaborative Notes Editing
New Proof-of-concept

## Features:
- Manipulation of sticky notes:
    - Add / Delete notes
    - Drag notes
    - String operations for the content of each note (sIns & sDel, globally more efficient than cIns & cDel)
- Users
    - Registration / Connection
    - Session -> Only authentified users can access the service
    - Strong encryption of the passwords (bCrypt)
    - A user can run several clients nodes
    - Each user can see the list of other clients and their number of nodes.
- Persistence (notes, operations, users)