Go back to Windows types: DWORD UINT...
Refactor to use "every N" iterator.

Use a custom iterator to sum all the blues at once, all the reds at once, and all the greens at once.
Add AverageColor_ParallelInvoke.
Add an impl using parallel_reduce().

Also in combination with parallel_invoke().
Refactor to take std::vector::iterators.

Limit the scope of ColorIterator to those functions that need it.
Fix warnings.
Add pixelCount variable for readability.
Optimize AverageColor_Task().
Remove old files.
Merge branch 'iters' into develop