move ryu-manager to entrypoints

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

setup.cfg

@@ -25,8 +25,6 @@ packages =
 data_files =
     etc/ryu =
         etc/ryu/ryu.conf
-scripts =
-    bin/ryu-manager
 
 [build_sphinx]
 all_files = 1
@@ -47,3 +45,7 @@ doc_files = LICENSE
 setup-hooks =
     pbr.hooks.setup_hook
     ryu.hooks.setup_hook
+
+[entry_points]
+console_scripts =
+    ryu-manager = ryu.cmd.manager:main