disabled NVidia Visualization test, it's functionality (draw rectangles) doesn't used in gpu module

wrote more complicated tests for them
implemented own version of warpAffine and warpPerspective for different border interpolation types
refactored some gpu tests

update gpu tests

*fixed some warnings
*finished gpu test port to gtest framework

2) NVidia tests for GPU
3) FD sample that uses NVidia's interface.

minor code refactoring

simplified gpu::columnSum test, it doesn't fail on Quadro anymore (when seed is 000001af5a11badd) after BFM test, but something definitely wrong with NPP_Staging's transpose

added first version of gpu::matchTemplate, currently it works only with 8UC1 images and SQDIFF method

2) fixed gpu bm test fail
3) CMAKE_MINIMUM_REQUIRED(VERSION 2.8.3)

refactored gpu module.

disabled gpu::sum, gpu::minMax, gpu:Canny until fix crash.

minor fix of matrix_operations.cpp.

added RGB <-> XYZ color conversion.
gpu morphology minor fix.

added gpu::cvtColor for BGR5x5 <-> BGR and BGR5x5 <-> Gray.

added gpu exp, log, magnitude, based on NPP.
updated setTo with new NPP functions.
minor fix in tests and comments.

* tests do not crash without test data
* test files renamed in systematic way
* added Test suffix for test classes names
* ts->printf used instead of some cout