Create Module Header File From Workbench

[richATavail]

In the configuration directory, add a feature that adds a new Module Header File (.mhd) at the project or the root level. This should:

1. Be accessible from the context dialog
   
2. Update the appropriate moduleHeaders Workbench.availProject. Make sure array in the project configuration file (accessible from Workbench.availProject) is updated and written to disk.

"moduleHeaders": 
[
	{
		"name": "Copyright",
		"fileName": "copyright.mhd",
		"description": "Contains an Avail-specific copyright."
	}
]