====== Release 2.13 ======

Release date: April 4th 2014.

===== New Features =====

  * new application ideal with an interface to singular (4.x.x)
  * new application fulton for normal toric varieties
  * quadratic field extensions and exact representations of Platonic solids (and others)
  * new bundled extension for libnormaliz
  * new interface to ppl
  * additional symmetric convex hull implementations via sympol
  * new rule to test regularity of a complete fan
  * visualization: saving the view point
  * visualization via sketch: new option Scale, can now do VertexLabels and individual colors per vertex or facet
  * new formatting_filter for numbered/labeled array types
  * fast loading of gzipped XML files
  * further modularization via bundled extensions
  * enhanced extension management: dependences, credits, reconfiguration
  * experimental version of PolyViewer (?)
===== Changes=====

  * partial refactoring in application tropical (to be continued)
  * refactoring of heuristic methods in application topaz (e.g., for sphere recognition)
  * discontinued support for legacy versions of gcc and perl (gcc 4.2/perl 5.10 or higher needed)
  * ''create_24_cell'' replaced by ''regular_24_cell'' from general Wythoff construction (now comes with the group)
  * ''eliminate_denominators'' (for type ''Matrix'') renamed to ''eliminate_denominators_in_rows''; reason: avoid confusion with new function ''eliminate_denominators_entire'' with same signature; ''eliminate_denominators'' for type ''Vector'' unchanged
  * visualization: Sketch-Output has a different papersize, so you don't need to scroll down anymore