adds copy() support to homogeneous.
Merge remote-tracking branch 'upstream/master' into hcopy2
set h_matrix on alignment tests
as_non_alignment method
more tests for h package
Perf fix on Scale transform construction

Conflicts:
	menpo/transform/homogeneous/scale.py
imports out of warp_to_shape

Conflicts:
	menpo/transform/homogeneous/base.py
more coverage on transforms
doc fixes in transform
fixes channels str in __str__ bug
Merge pull request #372 from nontas/channels_str

Fix bug when printing `channel` string
Merge pull request #363 from jabooth/hcopy2

Adds copy() support to homogeneous family