added regression test to make sure users can checkout after adding items to cart
Added test to check if users do not share same cart
finished test for users not sharing cart
fixed session#destroy bug when no current order
Merge branch 'regression-tests' of git://github.com/Adam89/fourth_meal into adam
Merge branch 'master' of https://github.com/fluxusfrequency/fourth_meal into regression-tests
deleted redundant file and moved its test into user_checkout_test
added more test
Merge branch 'master' into adam
resolved merge conflict
passed regression test for share cart between users by updating session#destroy: no longer empty session[:current_order] before the conditional that relies on it
all green