Update output messages for validator rules.

[timronan]

Change output messaging for column 1 of error/warning 402 from "null" to /path/to/file.

Remove commas from output messages from error 201 and 302.

[timronan]

Change output messaging for column 1 of error/warning 402 from "null" to /path/to/file.
Error/warning 402 utilizes the NestedMessage class at stationxml-validator.edu.iris.dmc.station.rules which currently does not have access to the path of the source file.

It seems like the source path could be provided to the NestedMessage class by adding a setSource method. The NestedMessage.setSource method could utilize the Message.getSource and Message.setSource methods.

	@Override
	public void setSource(String source) {
		super.setSource(source);
		for(Message message:nestedMessages){
			source = message.getSource();
			message.setSource(source);
		}
	}

This code block does not work as described above and needs to be modified.

Remove commas from output messages from error 201 and 302.
This has been addressed.

[timronan]

The output messaging has been improved through many different commits. Nested messaging has been included for all relevant rules.