Adds first visualization widgets.
set max image value to non-mask pixels
refactor PWA. Faster
fixed tests for pwa
default to CachedPWA
Merge pull request #424 from nontas/white_background

White background (non-mask pixels)
Merge remote-tracking branch 'upstream/master' into first_widgets
HOTFIX: label=all->label=None
Merge remote-tracking branch 'upstream/master'
feature_type -> features all of Menpo - Benchmark
fix benchmarks
Adds HDF5able serialization support to Menpo
Merge pull request #425 from jabooth/cleanpwa

Faster cached piecewise affine, Cython varient demoted
Merge pull request #427 from jabooth/hdf5able_pull

Adds HDF5able serialization support to Menpo
Merge remote-tracking branch 'upstream/master' into rm_feature_type
Merge remote-tracking branch 'upstream/master' into rm_feature_type
remove bridge for feature_type/feature
BUG: Constrain mask to landmark with existing mask

If you had non-all-true masks and called constrain you would
fail, which was a nasty bug
Make background white when viewing
Merge pull request #426 from jabooth/rm_feature_type

rename 'feature_type' to 'features throughout Menpo