Add footer information detailing revision of generated docs (if applicable)

[ghost]

Created by Predominant, 12th Dec 2009. (originally Lighthouse ticket #3):

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It would be super neat if the api generator included (somewhere out of the way like down in the footer) some meta information about the code that was used to generate the docs including versioning information.
For example, if there is a .svn directory or a .git directory hanging around that can be investigated (or any other versioning mechanism that you want to support), it will use that. Fall back on a configurable version number that would need to be manually edited to include a version number if desired. If no versioning information is supplied, adn the version information is not specifically provided, show nothing.

This will be handy when you are dealing with various versions of code that provide differing implementation.