Directory structure:
	src/
		Contains YouGen implementation.
	grammars/
		Contains example YouGen text grammars.

YouGen requirements:
	1. Python 2.5.2 or later.

YouGen install:
	1. Unpack youGen_dist.tar.gz under a directory. The absolute path to the
	 directory is referred to as P hereafter.

	2. Add to the PATH environment variable the path to 'P/youGen_dist/src'.

	3. Replace '/home/wanghy/youGen_dist/src' in src/genex.py with
	 'P/youGen_dist/src'.

YouGen install test:
	1. cd P/youGen_dist

	2. genex.py grammars/twobit_count.gr
		The output should be:
			0 0 
			0 1 
			1 0 

	3. genex.py grammars/call.gr
		The output should be:
			Macintosh Linux Macintosh 
			Windows SunOS Macintosh 
			Macintosh SunOS Windows 
			Macintosh Windows Macintosh 
			Windows Linux Windows 
			Windows Windows Windows 
