Move website.make into make/. Update relevant documentation.

Move website.make into make/.  Update relevant documentation.

The new mantra for doing a local lilypond.org test is now

    #! /bin/sh

    cp -pv Documentation/lilypond-texi2html.init scripts/build
    cp -pv Documentation/web/server/*.htaccess scripts/build

    TEXI2HTML=$(type -p texi2html)
    LILYPOND=$HOME/vc/lilypond
    #from where to copy?
    #ONLINE_ROOT=$LILYPOND/out-www/online-root
    #DOC=$ONLINE_ROOT/Documentation
    DOC=$LILYPOND/Documentation

    make -f make/website.make website \
      EXAMPLES=$DOC/web/ly-examples/out-www \
      PICTURES=$DOC/pictures/out-www \
      WEBSITE_ONLY_BUILD=1 \
      TOP_SRC_DIR=$(pwd) \
      TRUSTED_DIR=$(pwd)/scripts/build \
      TEXI2HTML_PROGRAM=$TEXI2HTML