increase epsilon for GEMM & Convolve sanity tests for CUDA 5.5
Merge pull request #3 from Itseez/2.4

OpenCV changes
fixed gpu bitwize operation:

incorrect types for template instantiation
Add IPP 8.0 support in FindIPP script
Merge pull request #1215 from jet47:cuda-5.5-sanity
Merge pull request #1269 from kdrobnyh:FindIPP-cmake-script
Merge pull request #1306 from jet47:gpu-bitwize-fix