refactored gpu info structures (TargetArchs and DeviceInfo)

now DeviceInfo provides full information about device (from cudaDeviceProp)

samples/gpu/stereo_multi.cpp

@@ -81,8 +81,8 @@ int main(int argc, char** argv)
         if (!dev_info.isCompatible())
         {
             std::cout << "GPU module isn't built for GPU #" << i << " ("
-                 << dev_info.name() << ", CC " << dev_info.majorVersion()
-                 << dev_info.minorVersion() << "\n";
+                 << dev_info.name() << ", CC " << dev_info.major()
+                 << dev_info.minor() << "\n";
             return -1;
         }
     }