#494 Implement role system and rights in profile categories

[Thomas-RCV]

We should add the profile categories to our permission system.
It should be possible to hide categories with all contained profile fields automaticly for users and also in own profile.
Doing so, internal parameters could be saved for chairmans of clubs, etc.

Look at thread:

http://www.admidio.org/forum/viewtopic.php?f=2&t=5258