v0.4, 2010/02/25
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 * Fix broken easy_install problem of 0.3 version

v0.3, 2010/02/20
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 * Add --ignore-installed and --upgrade back, now you have choice to run 
   gluttony on installed packages or on pypi
 * Fix bug of drawing no dependency diagram.

v0.2, 2010/02/19
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 * Makes the name of nodes look better
 * Support output dot file with PyGraphviz or Pydot 

v0.1, 2010/02/19
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 * Initial release.