Affected functions surf.ocl, pyrlk.ocl and hog.ocl are updated with the change.

Add CL_CPU to supportsFeature check
simplify the logic of pyrlk

fix a error in doc

simplify the logic of save binary

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

change the download channels to oclchannles()
fix bugs of arithm functions
perf fix of bilateral
bug fix of split test case
add build_warps functions