using VideoCapture instead of CvCapture* in cascade tutorial

corrected constants,  changed objdetection.cpp as well

updated objDetection2.cpp as well

fixed headers in objdetection2.cpp

removed useles RNG

fixed buildbot warnings (wow, i like that bot!)

victim of the war on whitespace

fixing buildbot warnings

fixing last buildbot warning, heya .

trying to rebase/squash commits
rebased commits
Merge pull request #1304 from berak:doc_tut_cascade