Open "Install plugin" dialog with user's home directory instead of '/'
Merge pull request #185 from zas/pluginshomepath

Open "Install plugin" dialog with user's home directory instead of '/'
Set QApplication.applicationName and organizationName

Those values are used by the QSettings class when it is constructed using the empty constructor.
This saves having to repeat this information each time a QSettings object is created.
Some libs (ie. Phonon) require those to be set