Fix ec2 get ami's script
Merge branch 'staging'
Add own images in list_images. Filter HVM instances.

Include the user's images (amis).
In addition, we need to filter HVM images because linux instances do not
seem to work correctly.
Optimize list_images
Machine's "probed" is never set to false
Automated build of mist.js
Store machine id and backend id in a rule, when related machine hasn't loaded yet
Get machine from backends controller and set it to rule
Add a warn
Don't overload machine attribute
Fix hardcoded dict key for default value
Merge branch 'fix_rules'
Automated build of mist.js
Fix images spinner (shows up when user has no backends)
Automated build of mist.js
Fix ever-probing machines
Automated build of mist.js
Fix rules display bug.

JS did not like the fact that list_machines was not populated when we asked
for all rules and monitored machines.
Automated build of mist.js
Add drop downs on trial form