Start a new makefile for the web site.

Add a new makefile to build .html files from .php and .inc source files.
Unlike the previous makefile, it does not require explicit listing of
pages and sub-directories, which helps when the site is reorganised.

The new makefile does not use recursive make.
It can be invoked at the top-level like:  make -f Makefile.new

Makefile.new:
	As above.