[geotk] First version of download.geotoolkit.org

[Martin Desruisseaux]

Hello all

The http://download.geotoolkit.org/ web site has been setup. The content of this 
web site will improve with time. In the main time, this initial draft will 
hopefully help users to be informed of their options.

One note about the EPSG embedded database available in the 3.00 release: to get 
it working, the JavaDB or Derby JAR file must be declared explicitly on the 
classpath. I'm unsure about whatever we should declare a Maven dependency or 
not. For now we have not yet setup such dependency, on the basis that JavaDB is 
installed by default on Windows JDK and Linux distributions provide their own 
packaging for JavaDB. We may change our mind as experience will teach us.

Note that there is no longer database-specific plugins (gt-epsg-access, 
gt-epsg-postgresql, gt-epsg-hsql, etc.). There is just one plugin ruling them 
all (but only JavaDB and PostgreSQL have been tested up to date), while 
developers still have the opportunity to write their own plugins if they wish.

	Martin