Put a few words about how to change the API into this document (rather than having a separate README.pythonAPI document).  Also, there were some rewordings of the initial paragraphs.
Put a few words about how to change the API into this document (rather than
having a separate README.pythonAPI document).  Also, there were some
rewordings of the initial paragraphs.

svn path=/trunk/; revision=3478

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot