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

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

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