Fix equalization formula in equalizeHist function & rewrite in C++

Old implementation did

    lut[i] = 255 * (count(Y <= i)) / (width * height)

which actually shifts uniform histograms.
From now histogram is equalized as

    C = count(Y == min(Y))
    lut[i] = 255 * (count(Y <= i) - C) / (width * height - C)

when compiled with GStreamer, open (of a file) segfaults.

Fix was suggested by Bostjan Vesnicer.

This option provides an easy way to identify tests having no regression data
for sanity checks

Also fixed a typo in performance testing framework and removed hardcoded
temporary file name from highgui perf test

OpenCV Manager version++.

Prevent imread from illegal memory access (Bug #2602)

Feature #2565 implementation

Update googletest to the latest upstream

Bug #2595 in OpenCV Manager fixed.

Fixed typo in OpenCVDetectOpenCL.cmake that resulted in cmake not findin...

Ugly hack to make HoughLines sanity check pass on Windows

* use OPENCV_TEMP_PATH environment variable on all platforms
* fix cleanup after OpenCV tests on Windows
* add --list flag to output names of all tests found
* do not override user-passed --perf_min_samples and --perf_force_samples
  options by --check flag
* fix complier checks inside run.py

The change is based on pull request #211.

OpenCV Manager 2.x marks old 2.4.2 binary package for Tegra as "in use".
The latest version of OpenCV library compatible with platform is used now.

Some OpenCV Manager UI behavior updates;
CMake build fix.