Remove existing machines from maps. Fixes #584.
Complete the `CloudProviderContext` enforcement on `saltcloud.cloud`. Refs #546.
EC2 is now aware of the `__active_profile_name__` context variable. Refs #546
CloudStack is now aware of the `__active_profile_name__` context variable. Refs #546. PEP-8 + Indentation + Formatting
Digital Ocean is now aware of the `__active_profile_name__` context variable. Refs #546
GoGrid is now aware of the `__active_profile_name__` context variable. Refs #546
IBMSCE is now aware of the `__active_profile_name__` context variable. Refs #546
Joyent is now aware of the `__active_profile_name__` context variable. Refs #546
Libcloud AWS is now aware of the `__active_profile_name__` context variable. Refs #546
Linode is now aware of the `__active_profile_name__` context variable. Refs #546
OpenStack is now aware of the `__active_profile_name__` context variable. Refs #546
Parallels is now aware of the `__active_profile_name__` context variable. Refs #546
Rackspace is now aware of the `__active_profile_name__` context variable. Refs #546