Update some things after the switch to git.

- Do not use svnversion to find the version, instead use a revision
  count from git. As a result, the version number jumps back, however,
  so we should have a 2.5 release soon!
- Fix some URLs pointing to either the svn repo,
  or even to google code (!).

doc/COMPILING.txt

@@ -67,8 +67,8 @@ Erases all generated files (intermediate objects, and executable)
   make depend
 Re-compute the dependencies (makefile.dep).
 
-Other compilation targets (make version, make ziprelease) require Subversion
-and are only useful to contributors to the svn repository of Grafx2.
+Other compilation targets (make version, make ziprelease) require git
+and are only useful to contributors to the git repository of Grafx2.
 
 === System specifics ===
 

doc/README.txt

@@ -23,7 +23,7 @@ eventually like to draw the oldskool way !
 Grafx2 was originally written for the MS-DOS operating system. The authors then 
 released the sourcecode and we've modified it to run on your favorite platform 
 (if we missed it, please tell us !). Check the homepage at
-http://code.google.com/p/grafx2 for latest news and bugfixed versions.
+http://pulkomandy.tk/projects/GrafX2 for latest news and bugfixed versions.
 
 === HELP ===
 
@@ -49,10 +49,10 @@ The font Tuffy.ttf included as a sample in the fonts directory is public domain.
 The source code of Grafx2 should always be distributed along with the
 executable; You can normally find it in a packed archive whose name begins by
 "src". The source code is also available on the web site, either by accessing
-the Subversion repository:
-svn://pulkomandy.tk/GrafX2/
+the git repository:
+https://gitlab.com/GrafX2/grafX2.git
 or you can find the latest versions as packed archives:
-http://code.google.com/p/grafx2/wiki/Downloads
+http://pulkomandy.tk/projects/GrafX2/downloads
 
 === COMPILING ===