Bringing to current state

Non-git-documented part.
finished permissions models

except pgroups_permissions model
Added permissions-diagram
Cleaned data-folder
Added another permissions-diagram

For explaining the parent-structur
Added autoload_helper

And added it to the auto_load file.
Updating permission models

Beautifying code and adding functionality.
Revert "Updating permission models"

This reverts commit e9d10abf31c6bf5b16cea4033a019ac6dee1f9ac.
Updating permission models.

Beautifying code and adding functionality.
Updated permission models
Added permissions library

for central access and easy permission-handling
Beautified blog controller.
Removed ion_auth installation
Changed autoload_helper

Added function ip()
Now checks if function already exists helper is loaded and won't
overwrite it.
Added users_model

Added users_model for new authetication system.
CLI bugfix

Fixed notice when accessing via the CLI because of the undefined index
'REMOTE_ADDR'
CLI bugfix: Moved file to correct dir
Added CLI-cronjob controller
Major template improvements

- Major "hack"-fix, Template does not extend CI_Controller anymore,
works now with get_instance()
- Added title prefix, suffix and default setting.
Major template improvements: hook-fix

template::render_header is now hooked at post_controller_constructer not
pre_controller,
required for improvements.