Added proper testing of the end of quicktime video files.

CvCaptureFile::grabFrame() always returns 1 regardless, which causes
dead loop when relying on the return value of VideoCapture::read().
Removed trailing whitespace in cap_qtkit.mm.
Fix the build of OpenCV with XIMEA on Windows 64 bits:
  - crosses initializations in "cap_ximea.cpp" (which also contained some awfull "goto" instructions)
  - the "CMAKE_CL_64" variable is not initialized when using mingw

PR#1039 modified to be able to merge on branch 2.4
Trailing whitespace removal.
Using four spaces for indentation.
minX1 should be max(-maxD,0) not max(maxD,0), avoid black band at left
Reworked documentation building to work with extra modules.

The main problem with extra modules is that they're located outside
of the OpenCV root, while Sphinx requires that all documents are
within the documentation root. To circumvent this, we create a
"fake root" and copy all documentation (as well as all files that
it depends on) there. It's a bit messy, but what can you do.

As a bonus, this eliminates the need to generate modules/refman.rst
inside the source tree.
generalized ocl::resize for all data types (INTER_NEAREST mode)
ocl: fix cvtColor XYZ: variables on stack
compilation for VS2008
fixed some warnings
Applied all fixes related to translating C to C++ code
Also fixed some typos and code alignment
Also adapted tutorial CPP samples
Fixed some identation problems
Merge pull request #1808 from alalek:ocl_fix_cvtcolor_xyz
fixing bugs for Intel platform CPU device
fixed Split for device version equals 78712
FFmpeg 2.0.2 32-bit builded with mingw (4.6.1) with following additional options: --enable-w32threads --disable-iconv --cpu=i686 (workaroud for http://trac.ffmpeg.org/ticket/2363)
Merge pull request #1809 from ilya-lavrenov:ocl_resize_nn
Merge pull request #1807 from KonstantinMatskevich:intel_bug
Merge pull request #1722 from StevenPuttemans:feature_1631_second
Merge pull request #1806 from akarsakov:ffmpeg_without_iconv