Removed PLC test code.
* Added an x86 target and applied it to all projects in the solution.
* Added the IPlc interface and bound Plc to it.
* Added Plc to ClusterConfig and creation logic in ClusterFactory.
* Added header comments for a few files.
Merge branch 'dev/scada' of https://github.com/dkaynarc/tmc into dev/scada
* Fixed a bug in the creation of SerialConveyors