Both Synchronous and Asynchronous need to build the same binary data package to write a bytes array. Move that package building out into a common function.
Also use IEnumerable to pass in data instead of converting it to array and back multiple times. Not that happy with the whole ByteArray class, we could probably just use a MemoryStream instead.
Removed the Controls project and existing Test projects. Added new Test
project and references to NUnit and Should projects for testing.
Extracted IPlc interface to help test projects that reference this
library. Also implemented the IDisposable interface on the Plc object so
that references to mSocket would be cleaned up appropriately when the
object is blown away.
