divine: bumping version to 1.6.3

To be identical to the version of directfb switching also to version
1.6.3. The divine package needs at minimum directfb 1.6.0 as
dependencie.
Adding the license information to the package divine.
Also switch to Git for getting the package source because the tar.gz
for version 1.6.3 on directfb.org is broken because of a missed header
file inside.

[Peter: tweak comments]
Signed-off-by: Carsten Schoenert <c.schoenert@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>