describe repository template path expansions
add further clarification to template path rules
add some template expansion examples
clarify behavior of %subdirs%
suggestions from @jburel
suggestions from or inspired by @pwalczysko
clarification suggested by @manics
suggestions from @pwalczysko and @ximenesuk
Merge pull request #836 from mtbc/managed-repository-template-path-expansions

Managed repository template path expansions