Remove gear icon when not logged in. Fixes #60

Also, close the drop down menu upon selecting an item. Previously, the
menu stayed open (including being open whenever the user logs back in).
Fixed cane msgs
Merge branch 'master' of https://github.com/atlrug-rhok/medlink
Changed Sent to Submit on orders/new (Request Form) - fixed #67
Add link to new order view. Fixes #61

Somewhere in the devise swapover we lost the logic that directs
non-admin users to the new order page by default, and there wasn't a
link to it anywhere on the orders list. This adds a "new order" button
visible to non-admin users, and is mostly only intended as a stop-gap
for Patrick to do his user demo. We still need to implement a cohesive
global nav (#31).