fix backend button alignment
Change free trial period from 30 to 15 days.
Automated build of mist.js
Add Digital Ocean support.
Libcloud update

  also fix args for rackspace driver
fix logic error for ec2 machines of state Unknown
add name validation for Linode add machine
Automated build of mist.js
Merge branch 'master' into baremetal

Conflicts:
	src/mist/io/static/js/app/views/backend_add.js
	src/mist/io/static/main.css