New Moodle 1.8 theme.

My changes concerning theme / page layout work (it's all in CVS)
_ MDL-8142 - divs added for round corner graphics
used by theme "round_corners_deconstructed"
_ MDL-8109 - Flexible column positons - you may rearange the layout-table columns
used by theme "flexible_columns"
_ MDL-6798 - Bring back simple THEME->body and other theme colours :: CSS constants
_ MDL-8327 - moved column width settings from the index.php/format.php files to theme/config.php - more flexible

I propose to show new features with a round corner theme.

The code for graphical round corners is only in index.php and topics/format.php. I can add it to the other course formats. And with your help to the admin page.

Martin what do you think?