File inclusion should have a search path.

[skx]

There are two forms of file inclusion:

• Inclusion via the HTML::Template facility to use
• Inclusion via the meta-data: foo: read_file( "path/here" );

Both forms should allow a search-path to be defined. When expanding file-inclusions we should search the directory tree, relative to the source file, as we do now. If that fails search the global-include path(s).

Suggest we allow --include-path=includes/:/home/includes or similar.