Qt5 changed a few APIs  which makes ScintillaEditBase currently not possible to build under it.
OK. I won't be working on this myself.
Some changes committed to C++ files to allow compilation with Qt 5. , [27e23f], [a7e785], [c37c20]
Project files need to add "widgets" to QT variable but this is not compatible with Qt 4.7 so has not been changed:
QT += core gui widgets
Fix for project files in [fb1c79].
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