Get ready for the release of 3.9.2

Small updates to README, ReleaseNotes.txt and a bump in the version number
in the Makefile (forgot the in 3.9.1 - thankfully this is automatic for
git based builds).

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

README

@@ -1,5 +1,5 @@
 
-This is the README file for the second 3.9 Beta version of Subsurface.
+This is the README file for the 3.9.2 Beta version of Subsurface.
 
 After the release of Subsurface 3.1 we merged the Qt branch into
 master and started developing the Qt port of Subsurface in the master
@@ -7,8 +7,11 @@ branch. At this stage the Qt version has reached mostly functional parity
 with version 3.1. There are some minor items still missing, but in others
 it far surpasses what was available in 3.1
 
-The developers feel that this version is reasonably stable, but it has
+The developers feel that this version is quite stable and we think we are
-known bugs - please check trac.hohndel.org. Do not use this on your "real"
+close to a final release of Subsurface 4.0. There are a small handful of
+known bugs - please check trac.hohndel.org.
+
+Much as we are optimistic about 3.9.2, please do not use this on your "real"
 dive log files unless you have good backups. Check the XML files after you
 make changes to make sure that what you saved on disk reasonably resembles
 what you intended to do.
@@ -19,7 +22,7 @@ And most importantly, please provide us with feedback.
 
 
 
-Everything below has not been updated for 3.9.
+Everything below has not been updated since 3.1.1
 
 Subsurface - an Open Source Divelog
 ===================================

ReleaseNotes.txt

@@ -1,7 +1,7 @@
-			Subsurface 3.9.1 Beta
+			Subsurface 3.9.2 Beta
 			=====================
 
-The Subsurface developer team is proud to announce the first public beta
+The Subsurface developer team is proud to announce the second public beta
 release of the latest version of Subsurface.
 
 Subsurface is an open source divelog program that runs on Windows, Mac
@@ -38,7 +38,7 @@ available, the tank pressure curve) in very innovative ways that give
 the user additional information on relative velocity (and momentary
 air consumption) during the dive through the coloring of the graphs.
 
-New in version 3.9.1 (compared to Subsurface 3.1):
+New in version 3.9.2 (compared to Subsurface 3.1):
 --------------------------------------------------
 
 I don't even know where to begin. This is a complete rewrite of the UI.
@@ -51,22 +51,8 @@ Subsurface 4.0.
 
 Known issues:
 
-- integration with divelogs.de is still missing
+- upload to divelogs.de is still missing
-- on Windows the maps may or may not show - if you get a black window with
-  partial white outlines and the little dive flags for locations
-- we have reports of occasional crashes on Windows when trying to close
-  the window by clicking on the little x in the window decoration
-  instead of using Alt-F4, Ctrl-q, or File->Quit
 - Filter->Select Events is not implemented
-- Translations are extremely incomplete
-- Documentation has just been started
-
-These last two points are important. Because if you have always wondered
-"oh I wish I could contribute, too bad I can't program" - this is your
-chance. ANYONE can help us with Documentation, and almost anyone (ok, this
-does require that you speak a language besides English) can help with
-translations. Please send us email at subsurface@hohndel.org if you would
-like to contribute.
 
 
 New in version 3.1 (compared to Subsurface 3.0.2):

subsurface.pro

@@ -6,7 +6,7 @@ INCLUDEPATH += qt-ui $$PWD
 mac: TARGET = Subsurface
 else: TARGET = subsurface
 
-VERSION = 3.9
+VERSION = 3.9.2
 
 HEADERS = \
 	color.h \