[#471] Deprecate lib.helper link functions
[#471] Fix template for nav_named_link() removal
[#471] Fix template for subnav_link() removal
[#471] Use suggested function not direct link for clarity
[#471] Fix up nav_named_link() so now uses nav_link()
[#471] Fix subnav_named_route() to use nav_link()
[#471] Fix nav_link() when controller supplied as positional arg
Merge branch 'master' into 471-helper-clean-link-functions
[#471] Fix typo
Merge branch '471-helper-clean-link-functions'