Update to Jim's PWG Accents

GitHub discussion: https://github.com/sanskrit-lexicon/PWG/issues/9
related to accents.html
Screenshots of PWG entries (a, anu, aheLayant), not headwords (aha/m,
a\kzA, anu^) from scanned .pdf.
NB: Devanagari (= deva) display based on Siddhanta-Calcutta font has
(not only) अ instead of default अ. It’s closer to the “French” font used
in the original Petersburg printed dictionary as well, see A
(pre-unicode because of funding issues, the scan’s could be reproduced,
only the specific udātta is lacking). SLP1 samples found in pwgxml.zip.
On Cologne’s website IAST = Roman Unicode in the output dropdown menu.