Update README and ReleaseNotes for 4.8.3 / 2.1.4

Slight updates / rephrasing of the CHANGELOG entries as they get moved
to ReleaseNotes.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

CHANGELOG.md

@@ -1,9 +1,4 @@
-- Mobile: make dive list and download pages scalable
-- Mobile: add scaling capability for the user interface
-- Dive media: rudimentary support for XMP metadata
-- Desktop & Mobile: remember up to four dive computers that have been used to
-  download dives and provide easy shortcut buttons to switch between them
-- Mobile: add units selection to Settings page
+- replace this line with the first CHANGELOG entry (leading '-')
 ---
 * Always add new entries at the very top of this file above other existing entries and this note.
 * Use this layout for new entries: `[Area]: [Details about the change] [reference thread / issue]`

README.md

@@ -1,9 +1,9 @@
 # Subsurface [![Build Status](https://travis-ci.org/Subsurface-divelog/subsurface.svg?branch=master)](https://travis-ci.org/Subsurface-divelog/subsurface)
 
-This is the README file for Subsurface 4.8.2
+This is the README file for Subsurface 4.8.3
 
 Please check the `ReleaseNotes.txt` for details about new features and
-changes since Subsurface 4.8.1 (and earlier versions).
+changes since Subsurface 4.8.2 (and earlier versions).
 
 Subsurface can be found at http://subsurface-divelog.org
 
@@ -38,10 +38,10 @@ development version) you can either get this via git or the release tar
 ball. After cloning run the following command:
 
 ```
-git checkout v4.8.2  (or whatever the last release is)
+git checkout v4.8.3  (or whatever the last release is)
 ```
 
-or download a tarball from http://subsurface-divelog.org/downloads/Subsurface-4.8.2.tgz
+or download a tarball from http://subsurface-divelog.org/downloads/Subsurface-4.8.3.tgz
 
 Detailed build instructions can be found in the INSTALL file.
 

ReleaseNotes/ReleaseNotes.txt

@@ -2,6 +2,21 @@
 
 = _Subsurface_ Release Notes
 
+New in _Subsurface_ 4.8.3
+~~~~~~~~~~~~~~~~~~~~~~~~~
+- Desktop: enable GPU switching on macOS
+- Dive media: rudimentary support for XMP metadata
+- Desktop & Mobile: remember up to four dive computers that have been used to
+  download dives and provide easy shortcut buttons to switch between them
+- Mobile: make dive list and download pages scalable
+- Mobile: add scaling capability for the user interface
+- Mobile: add units selection to Settings page
+- Dive computer support:
+  - add support for Mares BlueLink Pro based BLE download
+  - add support for Aqualung i100
+  - Garmin Descent Mk1: allow import of FIT files downloaded from Garmin Connect
+  - fix bug in Shearwater Teric support
+
 New in _Subsurface_ 4.8.2
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 - Desktop: remove "edit dive" from the log menu. Nowadays we edit in place