move partial changelog to 'thanks' in README

Not sure what the sparkfun standard is, but the partial changelog in the code was weird and duplicative. It looks like the releases is the canonical changelog, so I converted it to a 'thanks' at the bottom of the README. YMMV.

Author: tedder

README.md

@@ -102,3 +102,8 @@ Please use, reuse, and modify these files as you see fit. Please maintain attrib
 Distributed as-is; no warranty is given.
 
 - Your friends at SparkFun.
+
+Thanks to:
+* David Mann @ Loggerhead Instruments, April 2019, date and time additions
+* Steven Rowland, June  2019, HPPOSLLH (High Precision Geodetic Position)
+* Paul Clark, July 2019, 8/16/32 bit versions of setVal, addCfg, etc

src/SparkFun_Ublox_Arduino_Library.cpp

@@ -17,22 +17,6 @@
 	Development environment specifics:
 	Arduino IDE 1.8.5
 
-	Modified by David Mann @ Loggerhead Instruments, 16 April 2019
-	- Added support for parsing date and time
-	- Added functions getYear(), getMonth(), getDay(), getHour(), getMinute(), getSecond()
-
-	Modified by Steven Rowland, June 11th, 2019
-	- Added functionality for reading HPPOSLLH (High Precision Geodetic Position)
-	- Added getTimeOfWeek(), getHighResLatitude(). getHighResLongitude(), getElipsoid(), 
-	getMeanSeaLevel(), getHorizontalAccuracy(), getVerticalAccuracy(), getHPPOSLLH()
-	- Modified ProcessUBXPacket to parse HPPOSLLH packet
-	- Added query staleness verification for HPPOSLLH data 
-
-	Modified by Paul Clark, 1st July 2019
-	- Added 8 and 32 bit versions of setVal
-	- Added newCfgValset8/16/32, addCfgValset8/16/32 and sendCfgValset8/16/32
-	to support the setting of multiple keyID and value pairs simultaneously
-
 	SparkFun code, firmware, and software is released under the MIT License(http://opensource.org/licenses/MIT).
 	The MIT License (MIT)
 	Copyright (c) 2016 SparkFun Electronics

src/SparkFun_Ublox_Arduino_Library.h

@@ -17,21 +17,6 @@
 	Development environment specifics:
 	Arduino IDE 1.8.5
 
-	Modified by David Mann @ Loggerhead Instruments, 16 April 2019
-	- Added support for parsing date and time
-	- Added functions getYear(), getMonth(), getDay(), getHour(), getMinute(), getSecond()
-
-	Modified by Steven Rowland, June 11th, 2019
-	- Added functionality for reading HPPOSLLH (High Precision Geodetic Position)
-	- Added getTimeOfWeek(), getHighResLatitude(). getHighResLongitude(), getElipsoid(), 
-	getMeanSeaLevel(), getHorizontalAccuracy(), getVerticalAccuracy(), getHPPOSLLH()
-	- Modified ProcessUBXPacket to parse HPPOSLLH packet
-	- Added query staleness verification for HPPOSLLH data 
-
-	Modified by Paul Clark, 1st July 2019
-	- Added 8 and 32 bit versions of setVal
-	- Added newCfgValset8/16/32, addCfgValset8/16/32 and sendCfgValset8/16/32
-		to support the setting of multiple keyID and value pairs simultaneously
 
 	SparkFun code, firmware, and software is released under the MIT License(http://opensource.org/licenses/MIT).
 	The MIT License (MIT)