Add note that ChangeLogs are no longer used

Enhance Makefile.am to add 'git log' entries to the ChangeLog
after the release of gparted-0.4.4.  This is performed by a dist-hook
target only on release.  E.g., make dist

ChangeLog

@@ -1,3 +1,16 @@
+2009-04-17  Curtis Gedak  <gedakc@gmail.com>
+
+        * *: This ChangeLog is no longer used.
+
+	     ChangeLog entries after 2009-04-17 are auto-generated when
+	     releasing.
+	
+	     On April 17, 2009, the source code repository was converted
+	     from svn to git.  ChangeLogs are seldom used with git.
+	
+	     For a detailed list of changes in the entire project,
+	     use 'git log' from the top level source directory.
+
 2009-04-02  Curtis Gedak  <gedakc@gmail.com>
 
 	* configure.in: gparted-0.4.4

Makefile.am

@@ -27,6 +27,22 @@ gparted:  gparted.in Makefile
 	$(do_subst) < $(srcdir)/gparted.in > gparted
 	chmod +x gparted
 
+dist-hook:
+	@if test -d "$(srcdir)/.git"; \
+	then \
+		echo Creating ChangeLog && \
+		( cd "$(top_srcdir)" && \
+		  echo '# Generated by Makefile. Do not edit.'; echo; \
+		  $(top_srcdir)/missing --run git log --stat GPARTED_0_4_4.. \
+		) > ChangeLog.tmp \
+		&& cat $(top_srcdir)/ChangeLog >> ChangeLog.tmp \
+		&& mv -f ChangeLog.tmp $(top_distdir)/ChangeLog \
+		|| ( rm -f ChangeLog.tmp ; \
+		     echo Failed to generate ChangeLog >&2 ); \
+	else \
+		echo A git clone is required to generate a ChangeLog >&2; \
+	fi
+
 EXTRA_DIST =			\
 	$(DESKTOP_IN_IN_FILES)	\
 	$(DESKTOP_FILES)	\

help/ChangeLog

@@ -1,3 +1,13 @@
+2009-04-17  Curtis Gedak  <gedakc@gmail.com>
+
+        * *: This ChangeLog is no longer used.
+
+	     On April 17, 2009, the source code repository was converted
+	     from svn to git.  ChangeLogs are seldom used with git.
+	
+	     For a detailed list of changes in only the help directory, 
+	     use 'git log -- help' from the top level source directory.
+
 2009-04-02  Curtis Gedak  <gedakc@gmail.com>
 
 	* gparted-0.4.4

po/ChangeLog

@@ -1,3 +1,13 @@
+2009-04-17  Curtis Gedak  <gedakc@gmail.com>
+
+        * *: This ChangeLog is no longer used.
+
+	     On April 17, 2009, the source code repository was converted
+	     from svn to git.  ChangeLogs are seldom used with git.
+	
+	     For a detailed list of changes in only the po directory, 
+	     use 'git log -- po' from the top level source directory.
+
 2009-04-12  Jorge Gonzalez  <jorgegonz@svn.gnome.org>
 
 	* es.po: Updated Spanish translation