Changes to eSpeak to support building on a POSIX system by running make.

This does the following things:
   1/  compile the libespeak library;
   2/  compile the speak and espeak command-line applications;
   3/  compile the espeakedit application;
   4/  compile the voice data, creating an espeak-data directory.

This allows you to run:

	make && sudo make install

and end up with a working espeak application.


This branch also contains some bug fixes and improvements that get
sent back upstream.