fix bug 168: cmake configuration

* add PACKAGE_VERSION to qucs-edit, qucs-filter, qucs-help, qucs-lib
* clean up some white spaces
fix issue with mouse cursor for OSX

* see bug https://sourceforge.net/p/qucs/bugs/104/
fix duplicated select retangle

* weird it only shows up if a Diagram is on the schematic
travis: workaround isse installing ADMS