Get quality and timestamp on monitor & UA client opt bug fix

New Feature:

• You can now get the quality and timestamp of the tags you monitor (see README).

Bug fix:

• The UA client options constructor was private; making the code shown in the README invalid. It has been made public.

Custom UA Client Options

New constructor for UaClient allows custom options to be passed in

Bug fixes

@china0zzl submitted a fix to the issue #51 - Having two or more of the same folder/tag names will no longer break.

GetDataType / Bug Fixes

Added the function GetDataType to the IClient (and UA and DA) class. Now you can get the C# data type of a tag using _client.GetDataType(tagName);

This function allowed me to correct an issue in h-opc-cli where writing a tag was malfunctioning with BadTypeMismatch.

New Options & Duplicate Key Error Fix

In this commit new options were added for the UaClient which could potentially help with timeout or timing issues. A longer default timeout was added as well.

In this commit a duplicate key issue was fixed which may occur when exploring a node multiple times.

UA Client Bug Fixes

• WriteAsync would not ever advance from task.Wait
  • Fixed by setting task result
• client.Reconnect and client.Recreate would not do anything if the client.Status was NotConnected
  • I do not see this as expected behavior and I removed those conditions
• Code coverage at 89%

(Accidentally tagged once without pulling locally. Won't happen again)

UA Client Bug Fixes

• WriteAsync would not ever advance from task.Wait
  • Fixed by setting task result
• client.Reconnect and client.Recreate would not do anything if the client.Status was NotConnected
  • I do not see this as expected behavior and I removed those conditions
• Code coverage at 89%

v0.4.0

ChangeLog

• Add asynchronous methods to the OPC interface
• Remove Subnodes property from Node class

v0.3.0

Fixes

• fixed the Dispose method of DA and UA when the connection hasn't been initialized
• Streamlined namespaces by removing the Common.Nodes namespace and incorportating it into the Common namespace

Features

• Added readOrDefault extension method for clients. With this method, if the read fail for an OPC error, a default value will be provided without throwing the OPC exception

v0.2.1

Fixes

• Fixed Dispose Method of OPC UA
• Improved diagnostic of DA errors