the package global name space problem is addressed; update road map

R=rsc, iant
CC=golang-dev
https://golang.org/cl/196087

doc/devel/roadmap.html

@@ -73,9 +73,6 @@ Gc compiler roadmap</h4>
 <li>
 Method expressions.
 <li>
-Support multiple packages with the same name (but different import
-paths) in the same program.
-<li>
 Implement goto restrictions.
 <li>
 Safe compilation mode: generate code which is guaranteed not to obtain
@@ -95,9 +92,6 @@ Gccgo compiler roadmap</h4>
 <li>
 Method expressions.
 <li>
-Support multiple packages with the same name (but different import
-paths) in the same program.
-<li>
 Implement goto restrictions.
 <li>
 Implement garbage collection.