co⚡e: Sparkplug™ MQTT edge

Fixed bug with FB_PayloadDataset.AddColumn(), which previously returned and outputted an ERROR [#11]
Now it only returns an ERROR

merged trunck changes from r190 to my branches/i-campbell

Added Decode Section to example usage of Payload [#11]

Fixed bug with adding Keys or Columns [#11]

Fixed bug with calculating array bounds [#11]

InitializeStructure() is now internal to the FBPayload. only FB_Payload.InitializeStructuredPayload() need be called [#28]
- ClaimNextFree* now Initializes the object (and vis a vis, all Add*Blank)
- Checked all FB_Payload*.Set*Blank, and they correctly initialize the object

Added Encode Functions for BinaryData, Double, Float and started encoding metrics. [#11]

removed todo about array sizes, made a decode UTF8 string [#11]

Completed Payload.EncodeNextString [#11]

branching example project to /branches/i-campbell

branching trunk to /branches/i-campbell

deleting old branch branches/i-campbell

delete local branch example branches/i-campbell

Added FB_Payload Example.

branched mqttsparkplugb-example.project and used CODESYS SVN

branched mqttsparkplugb-example.project and used CODESYS SVN

Added Complete List of setters and getters for FB_Payload and its Children [#11]

Fixed some typos [#11]

Continuing FB_payload Set and Get Methods [#11]

Worked On MetricGetting for FB_Payload [#11]

FB_Payload. Started to fill out a skeleton for how to read the individual members of a payload [#11]

Merged trunk into my branch. Lots of errors, as the Payload Struct and PayloadMetric Struct were deprecated [#11]

Added all pool claimers, to be used by the children of a payload.

Added all encode / decode inputs to the FB calls of FB_Payload and children [#11]