Release 0.5.0

• Add optional ‘mode’ parameter to set_members() method in port-channel
  interfaces API
• Add support for trunk groups
• Ensure multiple connections based on the wildcard settings do not clobber
  each other.
• Add ‘terminal’ to the ‘configure’ command to workaround AAA issue
• Fix issue where ‘enablepw’ in the eapi.conf was not properly used
• Catch errors and syslog them when parsing eapi conf file.
  In the event of an unparsable eapi.conf, a syslog warning will be generated
  but the app will continue to attempt to utilize the default localhost conn.
• Ensure that nil is returned when getting nonexistent username
• Ensure all parse methods are private
• Add tests for timeout values
• Update framework tests
• Add unit tests for switchports
• Address code coverage gaps