v0.04

• Fix: #12 slave sorting would fatally error if more than two localhost slaves were connected.
• Fix: Stopped parse_dsn crashing when exiting with a nil error string.
• Feature: Config table now takes connection timeouts and keepalive timeouts, so that a single config may be supplied with all settings.
• Deprecated: set_connect_timeout, set_read_timeout and set_connection_options are now all deprecated in favour of using the params table in new or connect.
• Tests: Lots more tests!
• Misc: Style improvements.