v2.2

Improved error handling.
iOS: Added EAAccessoryDevice
Bug fix: #78

v2.1

• Added ITimestampedMessage interface to easily get time stamps from any message that supports it.
• Added IGeographicLocation interface to easily get any message that supports reporting a location.
• Added GnssMonitor for simplifying monitoring location messages and reporting a location.
• Added an NTRIP client for getting RTCM correctional messages from an NTRIP Server.
• Improved the buffered stream to more accurately emulate baud rates.
• All messages now have a unique timestamp useful to expire older messages.
• Many sample app improvements in repo