socket: add aliases for write

sleewoo · meh · commit 20d880689dfe · 2015-02-10T16:56:03.000+01:00
People who always used `send` in javascript will be confused about
`NoMethodError: undefined method` exception :) And people who worked
with sockets in Ruby will definitely expect a `&lt;&lt;` method.
diff --git a/opal/browser/socket.rb b/opal/browser/socket.rb
@@ -107,6 +107,10 @@ def write(data)
     `#@native.send(#{data.to_n})`
   end
 
+  alias << write
+
+  alias send write
+
   # Close the socket.
   #
   # @param code [Integer, nil] the error code
