Merge branch 'hotfix/0.1.1' into develop

* hotfix/0.1.1:
  Moved 'vars' into 'defaults'
Refactored, added binary install option.

Refactored to split tasks into logical units. Now supports either a EPEL
(old binaries!) or a binary install from get.docker.io/builds latest.

Added two new options in defaults:

binary: true
binary_arch: x86_64
Merge branch 'release/0.2'

* release/0.2:
  Refactored, added binary install option.