* Split FileStream declarations and definitions
* Split JobPool declarations and definitions
* Split StringBuilder declarations and definitions
* Split StringReader declarations and definitions
* Split ZoomLevel declarations and definitions
* Fix missing include in FileClassifier.cpp
* Remove pragma once from source files
* Fix missing include in StringBuilder.h
* Update Xcode project
* Fix compilation of tests
Co-authored-by: Michael Steenbeek <m.o.steenbeek@gmail.com>
This will enable compilation of testpaint on targets different than x86.
It won't function the way it does on x86, but it should provide a way of
tackling various compilation errors that can only be seen in the very
specific environment required by testpaint proper.