Apple OpenCL framework hasn't OpenGL sharing extension

- fixed getProperty call definition
- added new parameter defitions

removed whitespaces

Reworked enumerators to keep values from previous commit

ximea enums fixes

- fixed whitespaces issue
- fixed duplicate enum values error

ximea enum definitions update

- fixed videioio.hpp code style
- fixed ABI violation in enums
- added new parameter handlers to cpp

XIMEA setProperty update

Added acquisition resetting to buffer size adjustment parameters.

As discussed here: https://github.com/Itseez/opencv/pull/6068#issuecomment-180797723

This project is dead from 1st September last year

Fix docs build failure by re-indenting with spaces instead of tabs.

Trailing whitespace fixes. http://pullrequest.opencv.org/buildbot/builders/precommit_docs/builds/5152/steps/whitespace/logs/stdio

mingw build fix.

The "CvCaptureCAM_XIMEA::getProperty" method had not the same signature as "CvCapture::getProperty" so it was not called when we use the "VideoCapture::get" method (the "const" specifier was missing).