+ Improve performance of calcOpticalFlowSingleScale method
+ Small refactoring

Current results:

IMAGE NAMES          RMSE
Beanbags
Dimetrodon           0.329428
DogDance
Grove2               0.550852
Grove3               1.464699
Hydrangea            0.523277
MiniCooper
RubberWhale          0.367246
Urban2               2.717003
Urban3               4.185070
Venus                0.775422
Walking

Time (for Urban3):
17.490248 sec

+ Fixed warnings
+ Add new function calcOpticalFlow with smaller number of arguments
+ Add asserts to algorithm and remove 'exit(1)'

+ New format for flow data - CV_32C2
+ Memory optimization
+ Cross Bilateral Filter optimization
+ Minor optimizations
+ Sample for calcOpticalFlowSF improved

declaration in includes, implementation, usage example, test

To speed up rebuilds, define the NDK_CCACHE environment or CMake variable
to the path to your ccache binary. When declared, the android.cmake.toolchain
automatically uses CCache when compiling any C/C++ source file. For example:

export NDK_CCACHE=ccache

Previously the generator always uses hardcoded list of modules.
This fix replaces hardcoded list with actual set of modules coming from cmake.

fixed MCVC warnings

added texture_binder

All the functions from it are moved to the header
opencv2/photo/photo.hpp

added some sample description

modified facedetect to properly display very oblong objects and optionally flip image horizontally (for profile face detection). Added LBP cascades by Attila Novak for profile face detection and silverware detection (those are results of GSoC 2012)

parallel version of remap, resize, warpaffine, warpPerspective. Some optimization for  2x decimation in resize algorithm

* No /arch:SSE3 in MSVC
* Warnings fixed or suppressed