This also fixes b.delta to have the correct value 0x03B4. The main difference
to ELinks' entity database is:
- entities not in the unicode database from 1997:
Scomma, Tcomma, euro, scomma, tcomma
- obsolete entities kept for compatibility:
emdash, endash, hibar
The root makefile is converted as well as some leaf Makefiles. This
also brings in the required infrastructure and adjusts configure.in
appropriately.
I converted only makefiles containing no configurable stuff, since
that'll require more consideration yet.
