Renamed SystemUser to Trader

	modified:   trade/app/app.rb
	modified:   trade/app/controllers/item_ctrl.rb
	modified:   trade/app/controllers/main_ctrl.rb
	modified:   trade/app/controllers/user_ctrl.rb
	modified:   trade/app/models/analytics/activity.rb
	modified:   trade/app/models/analytics/activity_logger.rb
	modified:   trade/app/models/store/organization.rb
	renamed:    trade/app/models/store/system_user.rb -> trade/app/models/store/trader.rb
	modified:   trade/app/models/store/trading_authority.rb
	modified:   trade/app/models/store/user.rb
	modified:   trade/app/views/store.haml
	modified:   trade/test/helper_tests/mail_client_test.rb
	modified:   trade/test/organization_test.rb
	renamed:    trade/test/system_user_test.rb -> trade/test/trader_test.rb
	modified:   trade/test/trading_authority_test.rb
	modified:   trade/test/user_test.rb
NOT FINAL!

	modified:   trade/app/models/store/trader.rb
Refactored a bit

	modified:   trade/app/controllers/authentication_ctrl.rb
	modified:   trade/app/controllers/item_ctrl.rb
	modified:   trade/app/controllers/register_ctrl.rb
	modified:   trade/app/controllers/user_ctrl.rb
	modified:   trade/app/models/store/comment.rb
	modified:   trade/app/models/store/item.rb
	modified:   trade/app/models/store/organization.rb
	modified:   trade/app/models/store/trader.rb
	modified:   trade/app/models/store/user.rb
	modified:   trade/app/views/all_items.haml
	modified:   trade/app/views/item_details.haml
	modified:   trade/app/views/organization_profile.haml
	modified:   trade/app/views/store.haml
	modified:   trade/app/views/user_profile.haml
	modified:   trade/test/activity_logger_test.rb
	modified:   trade/test/activity_test.rb
	modified:   trade/test/comment_test.rb
	modified:   trade/test/item_test.rb
	modified:   trade/test/organization_test.rb
	modified:   trade/test/trader_test.rb
	modified:   trade/test/user_test.rb
Improved doc

	modified:   trade/app/models/analytics/activity_logger.rb
	modified:   trade/app/models/store/item.rb
	modified:   trade/app/models/store/organization.rb
	modified:   trade/app/models/store/trader.rb
	modified:   trade/test/trader_test.rb
Updated doc again

	modified:   trade/app/models/store/item.rb
	modified:   trade/app/models/store/trader.rb
	modified:   trade/test/trader_test.rb
More tests

	modified:   trade/app/models/store/item.rb
	modified:   trade/app/models/store/organization.rb
	modified:   trade/test/item_test.rb
	modified:   trade/test/user_test.rb
hopefully final fixes

	modified:   trade/app/controllers/item_ctrl.rb
	modified:   trade/app/views/item_details.haml
Added functionality for auction

not working as expected as for now
Fixed everything
Updated Item.editable?

Add check for criteria: The selling mode, the minimal price, the
increment and the end time can be changed as long as no buyer has placed
any bid
Added more logic

Converter for a timespan to a string and things. Getter for current
winner and the time until the auction is finished.
Send mail when we got a new winner
you get a refund, if you are overbidden

cash is deducted as soon as you are the highest bidder. If someone else
gets the place, you get your money back.
Fix syntax error
Show form options based on selling mode
Changed Item.update() and Item creation to match new form
Added test for auction editability
Added an auctions-page

page where auctions can be seen. Auctions shouldn't be on Fixed-Page
anymore
Forgot to pass some variables
Added test for isFixed/isAuction