Allow older firmware to start successfully

Merge pull request #14 from sparkfun/pcUpdates

Fix for #13

Change HAS specific API calls to PPP generic

v2.0.2

Update version to 2.0.2 in library.properties

Add support for HAS and PPPNAV

v2.0.1

Update library.properties

Make getFirmwareVersion report combined major/minor

getFirmwareVersion() used to report '5' or '6', it now reports '105', '106', or '201' for firmware version 1.5, 1.6, and 2.1.

Add getFirmwareVersionMajor/Minor()

v1.0.10

Update library.properties

Add getFirmwareVersionMajor/Minor()

v1.0.9

Add getFirmwareVersionMajor/Minor

Add maxWaitMs overrides

These are helpful when reading/writing the various UART interfaces.

v1.0.7 - Add accuracy reporting based on GPGST

Merge pull request #9 from sparkfun/pcUpdates

v1.0.7

Add support for max differential age of RTK fix

v1.0.6

Update library.properties

Add support for CNR and Elevation

Adds support for PQTMCFGCNRTHD and PQTMCFGELETHD in v5 firmware.