Also, added the missing include guard to perf_precomp.hpp.
This should fix the build.

The test cases are ported from gpu module (masked version is still
missing).
Key point direction definition is synchronized with cv::SURF.
nonfree module dependency is added into ocl module's cmake file.

updated patch for tests; reenabled SURF & Denoising; removed fixes in ocl tests, since this is already fixed in another pull request

add a new function abssum
fix the bug of test and perf because someone remove non-free module from cmakelist.txt

remove as much warnings as possible
use enum instead of MACRO for ocl.hpp
add command line parser in accuracy test and perf test
some bug fix for arthim functions

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