Add 'reclass-show-key' command

- also, remove ssh_client and clear the helpers folder
diff --git a/setup.cfg b/setup.cfg
index 3e4ece9..6bafdf7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,3 +28,4 @@
 console_scripts =
     reclass-dump-params = reclass_tools.cli:dump_params
     reclass-remove-key = reclass_tools.cli:remove_key
+    reclass-show-key = reclass_tools.cli:show_key