Don't collect fixed styles in -Tfodt.
Don't collect fixed styles in -Tfodt.

To simplify the code, this is the first part of migrating to a fixed
<office:styles> section without any auto-generated parts.  This will
allow for user override and eventual movement into -Todt.

This migrates links, hrules, and codespans.  The "autosty" concept
has been removed.

kristapsdz/lowdown,kristapsdz/lowdown,kristapsdz/lowdown