Restore build on Windows
[799] Fix serial port freezes on Windows
Update Qwt to 6.1.0 and fix it's build under Qt5
Restore build under Qt5
Merge branch 'master' of git://github.com/Tasssadar/Lorris

Conflicts:
	src/misc/config.cpp
	src/misc/sessionmgr.cpp
	src/misc/utils.cpp
	src/misc/utils.h
	src/revision.h
Restore build with MSVC

* It can't handle multiple files with the same name