message: Update the .gitignore file a bit.
  Skip some more compiled binaries, qmake stash files (new with Qt 5.7.1?), and similar.
diff: @@ -3,14 +3,17 @@ global.h
  Makefile.Debug
  Makefile.Release
  *.o
  +*.qmake.stash
  moc_*.cpp
  ui_*.h
  qrc_*.cpp
  src-qt5/core/lumina-desktop/lumina-desktop
  src-qt5/core/lumina-session/start-lumina-desktop
  src-qt5/core/lumina-wm*/lumina-wm
  -src-qt5/core/libLumina/libLuminaUtils.so*
  +src-qt5/core/libLumina/test/test
  src-qt5/core/lumina-info/lumina-info
  +src-qt5/core/lumina-checkpass/lumina-checkpass
  +src-qt5/core/lumina-desktop-unified/lumina-desktop-unified
  src-qt5/core/lumina-open/lumina-open
  src-qt5/core-utils/lumina-config/lumina-config
  src-qt5/core-utils/lumina-search/lumina-search
  @@ -20,6 +23,8 @@ src-qt5/desktop-utils/lumina-fileinfo/lumina-fileinfo
  src-qt5/desktop-utils/lumina-screenshot/lumina-screenshot
  src-qt5/desktop-utils/lumina-terminal/lumina-terminal
  src-qt5/desktop-utils/lumina-textedit/lumina-textedit
  +src-qt5/desktop-utils/lumina-archiver/lumina-archiver
  +src-qt5/desktop-utils/lumina-calculator/lumina-calculator
  Makefile
  src-qt5/Makefile
  src-qt5/*/Makefile
  