Merge from vendor branch TNF:

Merge from vendor branch TNF:
Import tex-ly1-2010 as fonts/tex-ly1.

The Y&Y 'texnansi' (TeX and ANSI, for Microsoft interpretations of ANSI
standards) encoding lives on, even after the decease of the company; it
is known in the LaTeX scheme of things as LY1 encoding. This bundle
includes metrics and LaTeX macros to use the basic three (Times,
Helvetica and Courier) Adobe Type 1 fonts in LaTeX using LY1 encoding.