Incorporate bulk rule writing into source to XML and independently

[thejosmeister]

For source to XML it may be a case of either:

• prempting rules and adding into initial spec
• restrospectively adding rules via independent bulk rules write

Must be able to write bulk rules spec using headcodes and UIDs

[thejosmeister]

I have developed a common funtion to do this that will probably be the easiest way to do it so can close this