Pygpsclient

What's Changed
* Rc 1.4.10 by semuadmin in https://github.com/semuconsulting/PyGPSClient/pull/114

ENHANCEMENTS:

1. Add basic custom offline map facility to map view widget. See README for details. Thanks to wernerdd for suggestion.
1. Add support for SETPOLL msgmode (requires pyubx2>=1.2.38). This mode will automatically determine appropriate input mode (SET or POLL) for command or query UBX messages (NB: it will still be necessary to specify either output GET or input SETPOLL mode in the serial configuration panel when reading UBX data logs).
1. Add support for experimental UBXSimulator (basic UBX GNSS serial device simulator) from pygnssutils. To invoke, set userport_s setting to "ubxsimulator" and configure required NMEA/UBX data stream in local "ubxsimulator.json" file - see Sphinx documentation and example json file for further details.

FIXES:

1. Send empty datagram to UDP socket connections. Thanks to Williangalvani for contribution.

**Full Changelog**: https://github.com/semuconsulting/PyGPSClient/compare/v1.4.9...v1.4.10

What's Changed
* Rc 1.4.9 by semuadmin in https://github.com/semuconsulting/PyGPSClient/pull/112

CHANGES:

1. Update Rover widget for new pyubx2>=1.2.37 RELPOSNED payload definition.
2. Min version of pyubx2 updated to 1.2.37.

**Full Changelog**: https://github.com/semuconsulting/PyGPSClient/compare/v1.4.8...v1.4.9

What's Changed
* Release candidate 1.4.8 by semuadmin in https://github.com/semuconsulting/PyGPSClient/pull/108

FIXES:
1. Fix parsing of command line arguments (NB: command line arguments and/or environment variables will now take temporary precedence over saved config file settings)
1. Fix 'unhashable type' error when first displaying mountpoint data in NTRIP client panel


**Full Changelog**: https://github.com/semuconsulting/PyGPSClient/compare/v1.4.7...v1.4.8

What's Changed
* RELEASE CANDIDATE 1.4.7 by semuadmin in https://github.com/semuconsulting/PyGPSClient/pull/103

ENHANCEMENTS:

1. Add tkinter value to About dialog for reference.
1. Update Scatterplot widget to use planar approximation rather than haversine great circle formula at separations <= 50m

FIXES:

1. Fix relPosLength calculation in rover_frame.py
1. Fix typo in Scatterplot widget labels.


**Full Changelog**: https://github.com/semuconsulting/PyGPSClient/compare/v1.4.6...v1.4.7