Blocked revisions 75651 via svnmerge

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  r75651 | mark.dickinson | 2009-10-24 13:13:30 +0100 (Sat, 24 Oct 2009) | 7 lines

  Issue #7117: Prepare for backport of py3k float repr.
  Add the Python/dtoa.c file containing the main algorithms;
  add corresponding include file and include in Python.h;
  include license information for Python/dtoa.c;
  add dtoa.c and dtoa.h to Makefile.
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