extended ocl::convertTo
removed needless divUp
added performance tests for data transfer operations
Merge pull request #1439 from ilya-lavrenov:convertTo
Merge pull request #1461 from ilya-lavrenov:ocl_dataOperations
Merge pull request #1460 from ilya-lavrenov:ocl_divUp
ocl: fix invalid usage of alignSize (n is not a power of 2), added roundUp
Merge pull request #1468 from alalek:fix_alignSize_usage