Update hacking with MANPATH. Correct hacking README details.

hacking/README

@@ -6,6 +6,3 @@ To use it from the root of a checkout:
     $ . ./hacking/env-setup
 
 Note the space between the '.' and the './'
-
-Man pages will not load until you run 'make docs' from the root of the
-checkout.

hacking/env-setup

@@ -4,14 +4,17 @@
 
 PREFIX_PYTHONPATH="$PWD/lib"
 PREFIX_PATH="$PWD/bin"
+PREFIX_MANPATH="$PWD/docs/man"
 
 export PYTHONPATH=$PREFIX_PYTHONPATH:$PYTHONPATH
 export PATH=$PREFIX_PATH:$PATH
 export ANSIBLE_LIBRARY="$PWD/library"
+export MANPATH=$PREFIX_MANPATH:$MANPATH
 
 echo "PATH=$PATH"
 echo "PYTHONPATH=$PYTHONPATH"
 echo "ANSIBLE_LIBRARY=$ANSIBLE_LIBRARY"
+echo "MANPATH=$MANPATH"
 
-echo "reminder: specify your host file with -i"
-echo "done."
+echo "Reminder: specify your host file with -i"
+echo "Done."