mention you need wget

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@788 d0543943-73ff-0310-b7d9-9358b9ac24b2

INSTALL

 UNIX:
+	You will need 'wget' installed in your path so the build system
+	can download the dependancies.
 
 1) Prepare Automake
 	./configure