Resolved IDs in shoppingcart
Simplified shopping cart
Moved form generation into function, adapted sites
Fixed registration and DB inserts
Fixed checkout process steps 1-2
Completed checkout process
Added AUTO_INCREMENT to 'order.order_id'
Cleaned up files no longer needed (checkout process)
finished Rest API with "Did you know" on start page
updated Brainstorming.txt
adapted css
Merge remote-tracking branch 'origin/simon-branch' into fraenzi-branch

Conflicts:
	Webshop/webroot/checkout.php
Cleanup, updated TODO, fixed DIVs

- Cleanup and added comments to some pages
- Updated Developer Guide
- Updated TODO with current status
- Fixed DIVs in sidebar
Merge remote-tracking branch 'origin/fraenzi-branch' into simon-branch

Conflicts:
	Webshop/webroot/checkout.php
updated css for main page
Updated comments and dev guide
Merge remote-tracking branch 'origin/fraenzi-branch' into simon-branch

Conflicts:
	Webshop/webroot/checkout.php
changed css & updated ToDO
Updated Developer Guide
Updated Developer Guide with DB example
Updated documentation (dev guide, README, db description)
Updated documentation (dev guide, readme)