Description: install doc in the right place for Debian

Index: python-networkx-1.4/setup.py
===================================================================
--- python-networkx-1.4.orig/setup.py	2011-01-23 23:38:57.000000000 +0100
+++ python-networkx-1.4/setup.py	2011-03-10 19:59:13.864033970 +0100
@@ -46,7 +46,7 @@
           "networkx.readwrite",
           "networkx.tests"]
 
-docdirbase  = 'share/doc/networkx-%s' % version
+docdirbase  = 'share/doc/python-networkx'
 # add basic documentation 
 data = [(docdirbase, glob("*.txt"))]
 # add examples
