Updated wiki with:
- banner: geotools_power.png
- tagline: The open source Java GIS toolkit
- the banner on the wiki takes you back to the geotools home (in case you only got to the wiki by editing)
- thanks to Sam Smith for the imagery
Also noticed that the green and blue we used for the "Geo"" Tools" before have disappeared from confluence 1.3.
Produced several a "retro" banner and a powered by banner are provided in this color scheme.
Jody
