Fix building the iOS framework after I dropped the VERSION macro.

This version uses CMake to generate Info.plist, which should be more
reliable than the old approach.
Fix a potential bug of ParallelLoopBodyWrapper::operator(Range)
On a 32-bit compiler the calculation may result in data (size_t) overflow when running some paralleled algorithms (which can safely run on a 64-bit compiler).
This bug is found when running OpenCV's Retina tutorial on 32bit VS2010.
bugfix-for-3231
Changed the brief description of function Mat::colRange from "Create a matrix header for the specified row span." to "Create a matrix header for the specified column span."
Update build_framework.py
fixed problems with building iOS version
Merge pull request #1332 from pengx17:2.4_fix_parallel
Merge pull request #1234 from SpecLad:ios-plist
Merge pull request #1333 from kirill-kornyakov:bugfix-for-3231
fix  CMake changes
Merge pull request #1334 from MarkBelmont:bugfix_1
Merge pull request #1335 from alekcac:ios-build-fix