Document the changes since 4.5

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

README

@@ -1,7 +1,7 @@
-This is the README file for Subsurface 4.5
+This is the README file for the development sources after Subsurface 4.5
 
 Please check the ReleaseNotes.txt for details about new features and
-changes since Subsurface 4.4.2 (and earlier versions).
+changes since Subsurface 4.5 (and earlier versions).
 
 Subsurface can be found at http://subsurface-divelog.org
 

ReleaseNotes/ReleaseNotes.txt

@@ -1,7 +1,25 @@
-// _Subsurface_ 4.5 Release Notes
+// _Subsurface_ 4.5.1 Release Notes
 
-_Subsurface_ 4.5 - October 2015
+_Subsurface_ 4.5.1 - October 2015
--------------------------------
+---------------------------------
+
+Some of the changes since _Subsurface_ 4.5.0
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- fixed a bug that causes Subsurface to crash on Windows when run in the
+  German localization and using the planner
+- addressed an issue where in some environments the user wasn't able to
+  edit the existing print templates (and no error was shown, the edits
+  were just silently ignored)
+- link against hidapi if it exists; this is required to add support for
+  the Suunto EON Steel on Mac when using the matching version of
+  libdivecomputer
+- increase cloud storage timeout to increase the chance that this works on
+  very poor internet connections (which appear to be rather typical for
+  great dive locations)
+- mention the Shearwater Nerd as supported computer (should be identical
+  to the Petrel 2)
+- some more adjustments to better suit the needs of freedivers
 
 Some of the changes since _Subsurface_ 4.4.2
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~