Reverted to fog 1.5

Refs #6
Merge pull request #7 from greenalto/revert_fog

Reverted to fog 1.5
Release 0.2.1 reverting Fog dependency to 1.5

* Sets Fog dependency back to 1.5.0 to defer an issue introduced in 1.6
	https://github.com/rubiojr/knife-brightbox/issues/6
require 1.7.x of fog. this is related to #6
Merge pull request #8 from rubiojr/bump-fog-dependency

require 1.7.x of fog.
* version 0.2.2 * Updates fog to 1.7.0