Select Route to Send Stanzas

This change (0.13.0) is for select the route for the messages. In params register adds a new param "server" and the functions send, sync_send, send_presence and send_message lets you add a new param: ServerID.

The main idea is let you do this:

```erlang
process_message(#message{xmlel=Message, server=ServerID}) ->
    ...
    ecomponent:send_message(MessageNew, ServerID).
```