Colors in the interface

In order to make OmegaWiki less austere, colors have been added in the interface:
- light red for each language entry
- light blue for each definition or concept
For an example, have a look at Expression:wild

Note that these colors have been chosen to match, more or less, the colors of the OmegaWiki logo ;-)

These changes involve only a modification of the Monobook.css, so each user can also re-configure it to his own taste.

We are looking for more ideas to make the interface more appealing. Please do not hesitate to make any suggestion, should it involve only a css change or even a change in the php.

Thanks,
Kipcool.