add article info url to articles and suppliers
do not use attr_accessible (yet) - mass assignment errors occur
do not show link when it is blank
show article info url on show group_order too
first shot on improving edit article form

(see also foodcoops#209)
make result calculation a bit cleaner
add receive screen, quantities for model, redistribution
more clarity whether a number is number units or boxes
fix i18n
add package images [ci skip]
focus newly added input in receive
simplify model
only allow to add articles not already present in receive
make product redistribution work!
show debug message when access is denied, to easier find out what the controller name is to add to the configuration file, if so desired
make stock orders come up again
fix signup access
fix signup access

Conflicts:
	lib/foodsoft_signup/lib/foodsoft_signup/hooks.rb
Re-indent code blocks according to markdown syntax.
add tests and make editing ordergroups with user work