add method for gender mapping; fix naming of controllers

Signed-off-by: Clemens Brueckmann <cb@reqorder.com>
convert methods in userController to services

like:
getNextId
injectNavigationData
translateGender

Signed-off-by: Clemens Brueckmann <cb@reqorder.com>
Merge branch 'refs/heads/master' into chrome_support

Signed-off-by: Clemens Brueckmann <cb@reqorder.com>

Conflicts:
	javascripts/users_controller.js