This reverts commit 3dcddad8.

Conflicts:
	modules/ocl/src/opencl/haarobjectdetect.cl

This reverts commit 54ea5bba, reversing
changes made to 28e0d3d7.

Fixed constant value for focus mode FOCUS_MODE_CONTINUES_PHOTO;
Add setters and getters for exposure lock and white balance lock flags;
Excluded camera restart for all setters except frame size.

1. Remove whole-document highlighting in some function links
2. fix the function alias `readwriteimagevideo`