Version 0.1 (7/12/2004):
	- version with full functional curves

Version 0.2 (20/02/2005):
	- version with triangulated surface example

Version 1.0 (16/05/2006):
	- released version

Version 1.1 (22/10/2007):
	- version with full functional surfaces

Version 1.2 (11/11/2007):
	- multiple bugfixes
	- FLTK-based GUI
	- sophisticated examples
	- triangulated volume example

Version 1.3 (30/11/2007):
	- bugfixes in interface
	- improved volume triangulation
	- new plot style for volumes
	- user-defined surface transparency

Version 1.4 (25/12/2007):
	- multiple windows
	- fps counter
	- on-screen labels

Version 1.5 (25/01/2008):
	- improved lighting
	- optimized surface normals
	- improved transparency drawing

Version 1.6 (17/03/2008):
	- user-defined clipping planes
	- bugfixes in interface

Version 1.7 (3/10/2008):
	- user-defined curve transparency
	- references to graphics in plot

Version 1.8 (16/11/2010):
	- warnings instead exits

Version 1.9 (12/04/2011):
	- VS project files
	- bugfixes