Renamed some files to support naming scheme
changed modeditwindow -> legacymodeditdialog
added modeditdialog
mapped slots for modeditdialog
Merge remote-tracking branch 'upstream/master'

Conflicts:
	gui/mainwindow.cpp
Parsing the version files, part IV

Also, start of big refactors.
Merge branch 'master' of https://github.com/TakSuyu/MultiMC5