fixes ImageWindowIterator bug
Fixes project_out_vectors method.

- It also adds a convinient method property _jacobian to be used by the Simultaneous family of LK algorithms for fitting AAMs
adds imaewindowiterator tests
removes ceil
changes imagewindowiterator tests
adds hog dalaltriggs test
removes ceil and floor from dalaltriggs
removes useless comments from hog.cpp
zhuramanan n_channels test
adds igo, es and lbp n_channels tests
adds es and igo values tests
adds lbp values test
adds lbp values test II
fixes round in zhuramanan test
adds constrain_landmarks test
improves doc
Merge pull request #278 from nontas/features_fix

Features bugfix and tests
Merge pull request #271 from ja310/hotfix_model

Fixes project_out_vectors method.