Cleanup and un-gui ZipInstaller class:

- Use signals for updating the progress logger from  ZipInstaller class.
- Move ZipInstaller class to base folder as it doesn't rely on QtGui anymore.
- cleanup debugging output a bit.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20845 a1c6a512-1295-4272-9138-f99709370657

rbutil/rbutilqt/rbutilqt.pro

@@ -50,7 +50,7 @@ SOURCES += rbutilqt.cpp \
  configure.cpp \
  zip/zip.cpp \
  zip/unzip.cpp \
- zipinstaller.cpp \
+ base/zipinstaller.cpp \
  progressloggergui.cpp \
  installtalkwindow.cpp \
  talkfile.cpp \
@@ -95,7 +95,7 @@ HEADERS += rbutilqt.h \
  zip/unzip_p.h \
  zip/zip_p.h \
  version.h \
- zipinstaller.h \
+ base/zipinstaller.h \
  installtalkwindow.h \
  talkfile.h \
  base/autodetection.h \