AP_Math: Comments on WGS coordinate conversions
AP_NOTIFY: RTK GPS visual notification through faster blink
SITL: Piksi Heartbeat Message support, Integer-RTK baseline simulation
AP_GPS: SwiftNav RTK Driver and GPS AutoSwitch param
ArduCopter: GPS Callback for calculating base position
MAVLink: New message definitions for GPS_RTK
GCS_MAVLink: Add support for GPS_RTK messages
AP_GPS: GPS calculates MAVLink messages for GPS and GPS_RTK
ArduCopter: Move MAVLink size check into library
GCS_MAVLink: regenerate headers
GCS_MAVLink: fixed flymaple build

has dual GPS but no RTK support
AP_GPS: fixed build errors and warnings in SBP driver

shadowed variables and implied casts in structures
GCS_MAVLink: added missing RTK headers
GCS_MAVLink: fixed a shadowed variable
tools: Change LogAnalyzer tabs to spaces (per APM python conventions)
CameraFeedback: alt rel/msl, renamed CAMERA_EVENT

- include both “alt_msl” and “alt_rel”
- rename CAMERA_EVENT to CAMERA_STATUS
- clarify comments regarding message origin and order
- change pitch/roll/yaw to be camera rather than vehicle, earth frame
GCS_MAVLink: regenerate headers
tools: Allow LogAnalyzer to read from stdin rather than just files

Use - intead of the filename
tools: Allow LogAnalyser to emit its xml to stdout.

If you use - as the name for the output file.
tools: LogAnalyzer fixes to work with pipes as input

seek is not supported on pipes (and not needed in this case)
tell is also not supported, so count bytes on our own