Improve note tree structure interface

[geckom]

Improve the design of the notes tree structe and add the ability to drag and drop notes

Requirements

• Notes should have an icon to represent their type (ie note, task, etc)
• Drag and drop notes to different folders
• Drag and drop notes to change the order of the notes in a folder

[geckom]

Implemented jqTree menu for the notes under each project. Functions are still needed to drag and drop between folders an to change note order.

Icons also have yet to be added.