it provides more expectable results to end-users.
based on feedback by Alexander Alekhin

a separate function instead of an overload not to change the ABI.

rename VideoCapture paramter 'device' to 'index' in CPP to reflect that
it allows specifying the API.
update comments to explain how to specify the API.

http://code.opencv.org/issues/4462

Adding &31 to bit shift in order to silince coverity BAD_SHIFT defect

add default_stripes_count const

Fix SVM::trainAuto (Bug #4464)

Fixed errors in parallel_for based on pthreads

Fixing compiler errore & removing whitespaces

Fixing prallel_for_pthreads error and warnings on win

add template specialization Mat::push_back() for MatExpr paramters

extend push_back MatExpr to mat in unit test

cast to object instead of reference

test with multi-row MatExpr input