change Receipt Type label to Receipt
Merge pull request #616 from mykmelez/receipt-type-label
fix empty app listing and show a placeholder while loading apps so we're less scary
Removed initial receipt type selector, and associated logic. Also, cleaned up the receipt selector UI in app listings.
remove old panel showing logic
fix 'reveal' functionality. Fixes #614
remove Run button fixes #619
Merge pull request #626 from nickdesaulniers/removeRun

remove Run button fixes #619
Merge pull request #618 from potch/master

Clean up app listing UI
Merge pull request #627 from potch/ui-cleanup

Additional UI cleanup
don't show receipt menu when app is removed. Fixes #620
snazz up the Remove button. Fixes #621
Update simulator.js

Avoid hitting cache on issue #617. Is there a better way to make sure Request does not hit the cache?
Update simulator.js

#617
add upstream bug number to comment; keep 'url' field first
add Breck Yunits (https://github.com/breck7) to list of contributors
Merge remote-tracking branch 'upstream/master' into HEAD

Conflicts:
	addon/data/content/index.html
	addon/lib/simulator.js
Always display connect button and ensure running the simulation and the app before opening the toolbox.