initial version of obj exporter
add tests for export_obj
Unified fast copying for Menpo
fix landmark tests
remove deepcopy's and warnings
add ImageFeatures reestablishment after copy
slightly clearer Copyable debug code
improve documentation
add Copyable to API docs
copy for pwa
Merge pull request #398 from jabooth/menpocopy

Copyable - fast robust copy() throughout Menpo.
bunch of Python 3 compatibility fixes
fixes in menpo.transform
more print fixes
more python 3 compatibility fixes
move menpo.image.feature -> menpo.feature
move features to menpo.features.feature
steps to remove featurefunctions
remove compute_features entirely
remove str option for functions in fitmultilevel