Merge pull request #59 from ricarora/div

Div
add order validation
Merge pull request #60 from ricarora/useredit

add order validation
fix zip length
fixing merge conflict
commenting out print link
Merge pull request #61 from ricarora/print

Fixing Merge Conflict
fixing pending capitalization bug
Merge pull request #62 from ricarora/fix-checkout

fixing pending capitalization bug
styling print button
Merge pull request #63 from ricarora/print2

styling print button
adding path for user_category
adding redirect for login if already logged in
adding redirect for signup if logged in
adding redirect for buyer info if not logged in
removing find_user from carts controller (no longer in use)
more tidying in orders controller
adding redirect for orders#show if not logged in
adding redirect for user#profile if not logged in
adding redirect for order fulfillment if not logged in