adds compute_reference_shape
started with ATMBuilder build
Merge remote-tracking branch 'upstream/master' into lk_fitter
adds ATMBuilder
adds ATM class
adds ATMFitter and ATMFittingResult
adds PatchBasedATM
adds atm tests
sets igo as default feature for patch based methdos
Merge remote-tracking branch 'upstream/master' into lk_fitter

Conflicts:
	menpo/fitmultilevel/fittingresult.py
	menpo/fitmultilevel/test/aam_fitter_test.py
renames LSintensity to SSD
removes hdf5able from atm
Merge pull request #469 from nontas/lk_fitter

Active Template Models
adds basic functionality graphs and trees
adds MST
adds graphs tests
adds __str__
adds PointTree
Change to British spelling

Change center to centre
Change color to colour
Fix some docstrings

Major changes happen in PCA, keyword arg center becomes centre
Move extract_pathes_local to image

Changes to a more efficient Cython version as well