new command: batch GET

We need this to speed up the initial load of the driver.

live.lua

@@ -234,6 +234,15 @@ function live.run(buf)
   elseif cmd == 'GET' then
     local binding = buf:match('^%S+%s+(%S+)')
     live.send_to_driver(live.get_binding(binding))
+  elseif cmd == 'GET*' then
+    -- batch version of GET
+    local result = {}
+    for binding in buf:gmatch('%s+(%S+)') do
+      print(binding)
+      local val, _ = app.get_binding(binding)
+      table.insert(result, val)
+    end
+    app.send(table.concat(result, '\n--fw: definition boundary--\n'))
   -- other commands go here
   else
     local binding = cmd