Submodules will get listed prefixed with a '@', using a specific CSS class for
styling. The href will be set to the url of the submodule.
Filesize will appear as 0 and filemode will not be printed to avoid an awkward
mode: "?---------".
In writefilestree, we don't return anymore if an entry can't be categorized as
an object, but rather, fail if we can't retrieve its name.
- Combines and removes some redundancy.
- Makes <hr> softer by using dashed lines.
- Removes <a> underlines since the file/log view
have tons of links and reading them is a bit
distracting. Underlines are added on hover.
- Makes diff headers darkcyan to match the default
command line colors and not conflict with new
<a> style.
