rotated triangles
Merge branch 'master' into triangles-rotated

* master:
  doing diamonds for all the rest of the cases
  revert back to old way
  don't need these returns
  return nil if the svg element has no body
  store and set the color after we find a pattern

Conflicts:
	lib/geo_pattern/pattern.rb
Merge pull request #10 from jasonlong/triangles-rotated

New pattern: rotated triangles