The main changes for version 0.5

    - All programs use iterative parsing, processing the ext-rep input
      file design by design. So there is no limit on the input's size.
      The only exception is "bdtool" when ordering operation is
      requested. In this case the entire ext-rep tree is read into the
      memory before the ordering can take place.

    - The used combinatorial functions have been incorporated into the
      "block_design" module. The "pycombo" module is not needed any
      more.

    - All matrices are treated as positive semidefinite during
      computing statistical properties in "bdstat".

    - Got rid of all global hacks in "bdtool" and "bdstat".


WARNING:

    Make sure that you are using "numarray 1.1.1" or newer since
    the earlier 1.x series has a memory leak which can affect the
    programs in this package.