[build] fix the creation of bundles on OS X

macdeployqt will copy and modify the libraries. I had to do
`chmod -R +w $LIBDIR` one the ones which were read only.
Updated package configuration

Used PackageMaker 3.0.6.
I had to configure/make/install qucs, qucs-core and  asco
as root in order to get the permissions rigth.
added script to uninstall Qucs on a Mac

TODO should be shipped together with the Mac binary package.