Port plLocalizationEditor to Qt5
Fix pfLocalizationDataMgr's SetElementPlainTextData to work properly
without a database re-load.
Make it compile and work in GCC / Linux
Port plFontConverter to Qt5
Fixes for Linux compilation of plFontConverter
Clean up localization mgr lookups and add some missing mnemonics
Port plResBrowser to Qt5
Show size as hex too if requested
Added line to readme about Qt5 dependency
Merge pull request #413 from zrax/qt_tools

Port GUI Tools to Qt5