Release 0.7.1

[Manfred Moitzi]

Version 0.7.1 - 2016-02-21

• Supported/Tested Python versions: CPython 2.7, 3.4, 3.5, pypy 4.0.1 and pypy3 2.4.0
  
• NEW: read legacy DXF versions older than AC1009 (DXF R12) and saves it as DXF version AC1009.
  
• NEW: added methods is_frozen(), freeze(), thaw() to class Layer()
  
• NEW: full support for DXF entity ELLIPSE (added add_ellipse() method)
  
• NEW: MESH data editor - implemented add_face(vertices), add_edge(vertices), optimize(precision=6) methods
  
• BUGFIX: creating entities on layouts works
  
• BUGFIX: entity ATTRIB - fixed halign attribute definition
  
• CHANGE: POLYLINE (POLYFACE, POLYMESH) - on layer change also change layer of associated VERTEX entities