Update to upstream version 0.4

This is a bugfix release that fixes the following issues:

• Previously, the body format of the message sent out via Fedora Messaging was not complete. The URL was not including the prefix, and the details key did not include the nick. This caused FMN to not parse the message correctly. see commit 1151b06

• Previously when the MeetBot plugin was installed, any command that was not recognised by Supybot or its plugins would result in an exception being thrown #18. Additionally, none of the non-meeting commands (like .listmeetings and .recent) were working #20. Both these issues were related to a piece of experimental code that was causing some issues. This was removed in #21, and the commands work as expected now.