Issue 173 in svnbook: ch04: Consider noting when *not* to use branches

[svnbook at googlecode.com]

Updates:
	Labels: -Milestone-en-1.8 Milestone-en-1.7

Comment #4 on issue 173 by cmpilato: ch04: Consider noting when *not* to  
use branches
http://code.google.com/p/svnbook/issues/detail?id=173

Added a new section "To Branch or Not to Branch?" on the trunk:

    Sending        book/ch04-branching-and-merging.xml
    Transmitting file data .
    Committed revision 4393.

Backported to 1.7/en in r4394.