Issue 5 in svnbook: Document svnmucc

[svnbook at googlecode.com]

Updates:
	Status: Fixed

Comment #9 on issue 5 by cmpilato: Document svnmucc
http://code.google.com/p/svnbook/issues/detail?id=5

Calling this finished now.  The new bits may require further modification  
post-review, and I may find more places in the book where svnmucc's unique  
offering can be recommended, but the core of what needs to be said has been  
said.