removed contrib, legacy and softcsscade modules; removed latentsvm and datamatrix detector from objdetect. removed haartraining and sft apps.
some of the stuff will be moved to opencv_contrib module.
in order to make this PR pass buildbot, please, comment off opencv_legacy, opencv_contrib and opencv_softcascade test runs.

Also fixed some typos and code alignment
Also adapted tutorial CPP samples
Fixed some identation problems

HAVE_CONFIG_H -> HAVE_CVCONFIG_H

a lot of small corrections to bring down the number of undocumented functions, reported by the script; added em.cpp sample