pLaTeX 2016/04/17

This is the first community edition that will go on TeX Live 2016 pretest.

Changes from the original ASCII edition:

• Fix macros which are inconsistent with the latest e-pTeX
  (e.g. \footnote, tabular, \parbox, \underline).
• Fix several bugs in pLaTeX2e and ascmac.sty.
• Add platexrelease.sty. As with the latexrelease package, this
  package enables us to use the old versions of pLaTeX2e (from
  2006/11/10 the ASCII edition).
• Include files and documents for e-pTeX.