[kronolith] Multi-user display Patch

[Robert BARTHEE]

Hi ALL,
our patch has grown quite big, so now you can dowload it
at the following address: http://hordepatch.auranext.com/
You'll be able to see as well screen shots of this patch.

We would be pleased to discuss the eventual inclusion
of this patch in the main source tree because we believe
that it helps solve some problems in multi-user display.

Key points of the patch: 
========================
* Allow the display of bigger number of calendar 
* Use color on a per-users basis (one color for each user) 
* Keep the logic of a color for each type of task 
* Have the details displayed in a window when placing the mouse on a
rendez-vous