Include template option for specifying custom output template file.
Added binary-tree layout orientation [fixes #13]
updated packages
Merge branch 'binary_tree_packing' of https://github.com/calebrash/css-sprite into calebrash-binary_tree_packing

Conflicts:
	package.json
Merge branch 'calebrash-binary_tree_packing'
use layout for horizontal and vertical oriantation / add binary tree test / bump version
Merge branch 'master' of https://github.com/jacksleight/css-sprite into jacksleight-master

Conflicts:
	lib/css-sprite.js
Merge branch 'jacksleight-master'
added test case for custom mustache template