Correct handling of tag name and changeset author in sf-tag-hg-code Addition of sf-push-hg-tags and associated template file, for pushing the tags created in sf-tag-hg-code back out to the MCL. Minor whitespace rationalisation.

^SHOWSTOPPER RAISED:	critical
^ERROR:	major
^WARNING: .+ CANNOT BE FOUND IN THE SYSTEM PATH	ignore
^WARNING:	minor