Backslash is more logical separator
min_order field support and some comments
cleanup unneeded import
move OptionPrice admin registration to the proper place
check if product is valid in session
options picking form validation
do not display error on GET
Move session functionality to external objects

Also move forward from dispatch to get/post
move session stuff to separate file
full-featured price calculator and trade group support
add upload view
cleanup copy-paste leftover