Removes shiro.ini config file because it is not necessary any more

Signed-off-by: Mario Krizmanic <mario.krizmanic@gmail.com>
Removes panifex-service-impl module because it is not necessary

Signed-off-by: Mario Krizmanic <mario.krizmanic@gmail.com>
Moves Pagelet and PageletMapping interface to pagelet package

Signed-off-by: Mario Krizmanic <mario.krizmanic@gmail.com>