Show summary in help

Show a summary in the help text which describes what the application
does.

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>
Define separate package name and tarname

Both the name of the package and the tarname of the package is set to
flowers. This name is picked up in the about box and showed as flowers
with lowercase. Change it to uppercase and add a separate tarname field
to configure.ac.

Signed-off-by: Marcus Karlsson <mk@acc.umu.se>