Issue #2506 Unnecessary log printouts in OpenCV::camera fixed;
Native camera for MIPS Android 4.1.1 added.
Build script for camera updated.

- Adding Android SDK/ADT r21 compatibility;
- fixing stl headers path for new ndk;
- fixing native API level for Android projects

OpenCV testing via OpenCV Manager implemented.

uses old CommandLineParser class

These codes should be included into regular builds.

There was missing windows.h include in OpenGL interop code.

This fixes output for 8U and 8S vector depths.
They were mistakenly printed as characters instead of numbers.

vector index out of range

Memory leak in color-blob-detection sample fixed;
Default face size in face-detection is set to 20%;
Error handling improved;
Some possible mat leak fixed;
Manager verison and engine interface version incremented to fix incompatibilities;
Docs updated;

updated patch for tests; reenabled SURF & Denoising; removed fixes in ocl tests, since this is already fixed in another pull request

add a new function abssum
fix the bug of test and perf because someone remove non-free module from cmakelist.txt