21.01.2002
	Bug fix in transcendental_C.cc :
	nestedsums_helper_expand is called after remove_negative_degrees,
	flag reset to expansion_required.

23.01.2002
	Bug fix in ctor	(const archive_node &node, const lst &sym_lst)
	in harmonic_polyog, nielsen_polylog, classical_polylog and
	harmonic_sum_to_Infinity

	convert_Zsums_to_standard_form slightly changed

24.01.2002
	_nestedsums_evaluation_veto split into
	_nestedsums_evaluation_veto_type_A to type_D

	list_of_tgammas::set_expansion() improved

	prefix_increase_numerator()
	prefix_decrease_numerator()
	prefix_increase_denominator()
	prefix_decrease_denominator()
	in ratio_of_tgamma added.

26.01.2002
	nestedsums_helper_sort added

	nestedsums_helper_normalize modified
	nestedsums_helper_get_degree modified

	transcendental_fct_type_B-D modified

28.01.2002
	Z(Infinity) and S(Infinity) in a product are always now
	simplified to 1.

11.02.2002
	Documentation updated

07.03.2002
	Bug fix in ratio_of_tgamma::prefactor_increase_denominator

15.07.2002
	Upgraded to gcc-3.1 and GiNaC-1.0.9.

	subs has now one parameter more.

	ex_to_letter and similar functions for the other classes
	are now depreciated and should be replaced with
	ex_to<letter> in compiled code.
	In interpreted code, the old version is at the moment
	still more handy.

25.04.2003
	Version 1.1.1: Macro AM_PATH_GINAC_EXACT changed to
	AM_PATH_GINAC

20.08.2003
	Version 1.3.0: Upgrade to GiNaC-1.1.x
	Note that GiNaC-1.1.x requires gcc 3.y

	The changes in the interface of the nestedsums library are:
	- Everything is now in the namespace "nestedsums"
	- The depreciated functions ex_to_something are removed,
	  ex_to<something> provides the same functionality.

	And from GiNaC we inherited the following changes:
	- the static member variable precedence disappeared, it
	  has become a member function precedence().
	- simplify_ncmul and simplified_ncmul are now called
	  eval_ncmul and hold_ncmul, respectively.
	- the method has now "unsigned options" as last parameter,
	  instead of "bool no_pattern".
	- archiving requires now "lst & sym_lst", instead of
	  "const lst & sym_lst".

25.08.2003
	Version 1.3.1: Requires GiNaC-1.1.3

	- New functionality: Interface of Zsums and derived classes
	  to the class GiNaC::function

	- Bug fix in list_of_tgamma.cc

01.09.2003
	Version 1.3.2

	- Removed "using"-directives in header files

10.11.2003
	Version 1.3.3, synchronized to GiNaC 1.1.5

	- added patch for functions.cc

05.03.2004
	Version 1.4.4

	- added class root_of_unity and a function refine_Ssum
	  as support for the expansion around rational numbers.

	- added patch to make nestedsums compatible with GiNaC 1.2.
	  (This requires at least gcc 3.4, which handles nontrivial
	   covariant returns.)

12.05.2004
	Version 1.4.5

	- Fixed bug in root_of_unity.cc occuring for GiNaC 1.2

19.10.2004
	Version 1.4.6

	- adjusted for gcc 3.4 and GiNaC 1.3

13.05.2005
	Version 1.4.7

	- provides an implementation of
	 GiNaC::ex concat(const basic_letter & l1, const basic_letter & l2);

19.10.2005
	Version 1.4.8

	- Fixed bug in functions.cc occuring when converting the GiNaC function
	 of the Nielsen polylog to the nestedsums version.

10.05.2006
	Version 1.4.9 (based on GiNaC 1.3)
	- Adjusted documentation: contains link to version 1.4.10

	Version 1.4.10
	- works with GiNaC 1.4

10.06.2009
	Version 1.4.11
	- Cleaned up configure.ac and nestedsums.h.in for GiNaC 1.4

	Version 1.4.12
	- Works with GiNaC 1.5 (adjusted RTTI) and GiNaC 1.6

03.01.2017
	Version 1.5.0
	- Works with GiNaC 1.7 (adjusted eval)
	- requires C++11, lst's are initialized via {}

28.01.2017
	Version 1.5.1
	- uses keyword override

01.11.2019
	Version 1.5.2
	- Hosting web site changed from http://wwwthep.physik.uni-mainz.de/~stefanw
	  to http://particlephysics.uni-mainz.de/weinzierl
