move AAMFitters to aam.fitter
move AAM/PatchBasedAAM to aam.base from aam.builder
adds clm.fitter package, rearranged to be as SDM is
SDM moved to similar package structure as CLM/AAM
Merge remote-tracking branch 'upstream/master' into fitterpy
Merge pull request #432 from jabooth/fitterpy

aam.fitter, clm.fitter, sdm.trainer packages
Merge remote-tracking branch 'upstream/master' into warp_to_mask

Conflicts:
	menpo/fitmultilevel/aam/base.py
	menpo/fitmultilevel/aam/builder.py
	menpo/fitmultilevel/clm/base.py
	menpo/fitmultilevel/clm/builder.py
	menpo/fitmultilevel/sdm/fitter.py