This file records noteworthy changes.
+1.5.6 (28 January 2010)
+* Fixed compile problem with gcc 3.4.
+* Improved excompiler: The ginac-excompiler script will only be installed if
+ excompiler is supported and enabled.
+
+1.5.5 (04 November 2009)
+* Correct libtool versioning.
+
1.5.4 (02 November 2009)
* Default parser now can again read in user defined classes.
* Add mul::info() and add::info() support for numeric info_flags (GiNaC now can