hgweb: Search templates in templatepath/style/map, too, using a common function.
This allows for web templates to be self-contained in a directory, which makes
copying and modifying them easier.
Is there an error message when trying to diff non-existing files?
found: No such file or directory
not: No such file or directory
Is there an error message when trying to add non-existing files?
found: No such file or directory
not: No such file or directory