Break out scaleio vagrant environment for Mesos

[kacole2]

The scaleio folder has combined environments for docker, mesos, and kubernetes. In an effort to clean this up for better directed efforts, the components for Mesos will be broken out into a new folder called mesos. This will include:

• Installation of Docker
• Installation and configuration of REX-Ray
• Installation and configuration of Mesos
• Installation and configuration of Marathon
• Include a flag for optionally installing ScaleIO, will be installed by default.
• If flag for ScaleIO installation is set to false, then REX-Ray will be configured to use local virtualbox volumes.
• all documentation needs to be updated to reflect changes

[kacole2]

This is second priority. First priority is #75