Fix #97 - progress events might arrive _after_ the success callback

Don't accidentally recreate the progress bar if we are unlucky (bug
only visible in Firefox)
Merge pull request #98 from geeksville/fixprogress

Fix #97 - progress events might arrive _after_ the success callback
Load indicators for HTTP Requests
add loading indicator to vehicle detail view
Merge pull request #101 from diydrones/loading_indicators

Load indicators for HTTP Requests
mission toolbar

- add mission filters
- add upload button if user is logged in
- mission page now uses the missionList directive
- filters on user data with infinite scroll
- mission filters with loading indicators