CAD Exchanger 2.0, Jun 2010
    General:
    - Added support of new format X3D.
    - Extended support of multi-threading on multi-core systems.
    SDK:
    - Added support for MacOS and Linux.
    - Substantially redesigned API to offer more structured and explicit set of classes (each
      supported format now has explicit reader and writer classes).
    - Added mesh data model based on X3D format (ISO19775) and converter from shape to mesh
      model.
    - Added XDE-based data model that wraps Open CASCADE XDE/OCAF; added readers and writers
      in ACIS, BRep, IGES and STEP to convert to/from XDE data model.
    - Added API for user-defined settings (see cadex::Base_Settings).
    - Visual Studio 2005 binaries now depend on RTM'ed version of Visual Studio (8.0.50608.0).
      Thus, there is no need to pre-install VS2005 SP1 run-time redistributables.
    - Added SDK Developer's Guide and Installation Guide - see ./doc/html/index.html.
    - Added several examples demonstrating conversion using SDK.
    - Enabled automatic linking with SDK libraries when compiling on Windows.
    - Added support of transformations associated with subshapes into mesher, to prevent
      crashes that previously may happen during export to X3D, VRML or STL.
    ACIS-SAT format:
    - Enabled multi-threaded conversion on multi-core systems
    - Fixed parsing of rbblnsur (rolling ball blend) surfaces for SAT format versions
      12.0-15.0.
    - Added support of free vertices (not belonging to edges) into exporter.
    - Increased robustness to corner cases - empty (sub)shapes, Open CASCADE shapes with
      internal or external orientation.
    - Added support of torii with zero uv-direction into importer.
    - Added support of edges shared by more than 2 faces into exporter.
    - Added support of name attributes into importer and exporter.
    - Fixed export of colors and names from XDE assemblies.
    - Changed ACIS_AttrWriter API to not depend on Open CASCADE.
    - Dynamic library renamed from ACISOCC to CadExACIS for consistency with other formats.
    STL format:
    - SDK now produces smaller ASCII files due to more compact form of the vertex and normals
      coordinates.
    - GUI: Fixed bug of writing incorrect number triangles when exporting surface models into
      binary STL format.
    VRML format:
    - Fixed bug of potential memory corruption that could lead to a crash.
    X3D format:
    - Added as new format. Currently has export only (see X3D_Writer).
    GUI:
    - Fixed regression in RC1 that prevented app start on systems without Visual Studio 2005
      RTM run-time.

Beta Update 2 Public (build 423), Jan 2010
    General:
    - Added Command Line Interface (CLI) mode which enables translation in batch mode. Start
      'CAD Exchanger Command Prompt' from the Start menu or invoke 'ExchangerConv.exe --help'
      to get usage details.
    - Added CAD Exchanger Software Development Kit (SDK) which enables integration of CAD
      Exchanger software libraries into customer applications. For details please contact
      info@cadexchanger.com.
    - Improved performance of computation of surface model triangulations; this affects import,
      changing display modes and changing triangulation precision operations. Additional gain
      can be received on multi-core systems due to execution in parallel threads.
    GUI:
    - Slightly improved visual settings for more stylish appearance of 3D models.
    - Added export of 3D view contents to PNG and BMP formats.
    - Added option to apply multi-threading for computation-intensive algorithms (currently
      affects triangulation computation only).
    ACIS-SAT format:
    - Added support of colors to import and export.
    - Exporter now has a user-defined option to specify target ACIS format version (from 2.0
      to 20.0)

Beta Update 2 Invitational (build 371), Dec 2009
    ACIS-SAT format:
    - Added support for transformations with reflection, shear and scaling.
    - Added support for variable radius blend surfaces with round_chamfer and rotated_ellipse
      radius types.
    - Added processing of blend support of the blendsupzro type.
    - Improved processing of coedges using pcurves sub-ranges and/or when 3d curve and pcurve
      use different parametrization ranges

Beta Update 2 Invitational (build 359), Nov 2009
    - Fixed a bug of losing gradient background in 3D view after closing a
      neighbor document
    - Improved performance of importers and exporters.
    - ACIS-SAT: added ACIS-SAT import and export. Current scope includes geometry
      only. For additional limitations refer to Release Notes.
    - STL: fixed bug in writing binary files which prevented correct reading by
      some STL viewers.

Beta Update 1, Jul 2009
    - New display mode - triangulation. Displays underlying triangulation of
      surface models; equivalent to wireframe mode for mesh models.
    - Ability to change precision of the surface models triangulation. This
      parameter affects visualization quality and conversion of the surface
      models into mesh formats (such as STL, VRML, etc)
    - VRML 2.0 (1997) export is now supported. Current scope includes
      geometry only.
    - BRep importer now always ignores stored triangulation and uses
      user-defined value of the triangulation precision.
    - BRep and STL exporters now do not export hidden models (i.e. unchecked
      in the Model Explorer). IGES and STEP exporters still export them.
    - Automatic checking for updates. User will be automatically notified when
      new product releases become available.
    - Skipping invisible (blank) entities when importing IGES files at user's
      discretion.

Beta, Apr 2009
    - Initial release