Adapation to the unified versions of ControlSystemAdapter and DeviceAccess.

Status: Library compiles, tests do not yet compile.

made the message about disabled tests due to missing packages more specific by showing explicitly which package is missing

do not delete the executable if the demoApp-xmlGenerator crashes when being executed from within the makfile

Add some first code to produce an XML file describing the application variables published to the control system. This is not yet doing anything useful for now...

Introduced the VariableNetwork describing the connections of variables/accessors before things get actually instantiated. This is needed to generate an XML file containing the published variables based on that information.

This is a first mock implementation with very limited functionality. The idea is based on discussions during the OPC-UA control system adapter kickoff meeting and subsequent personal discussions.

set required version of DeviceAccess to 00.12, since the build environment variables might have changed

git-svn-id: https://svnsrv.desy.de/desy/mtca4u/InstaCoSADev/trunk@2636 5f601a5c-88b9-47f3-b851-818f6741d00d

git-svn-id: https://svnsrv.desy.de/desy/mtca4u/InstaCoSADev/trunk@2635 5f601a5c-88b9-47f3-b851-818f6741d00d