Cleaning Code with coder

Hi,

i saw many errors for groupadmin, so i started with a coder session to clean the minimal errors and make the code easier to read.

still missing:

• Line -1: @file block missing (in the moment i do not have the time to add these blocks)
• change the sql - queries in a way coder does not see a possible security problem in them (which is not right for a few examples i checked)
• better usage of t(), so all strings are translateable via http://localize.drupal.org