integrate scatter plot into DataFrame/Series plot (or scatter) method
from mailing list:

"I've been searching the API/Internet to find the easiest way to make call plt.scatter() with a dataframe.  I figured there would be a keyword if df.plot(kind='scatter')  or df.scatter() but this seems not to be the case.  I saw from the API that kind only accepts three arguments:

kind : {‘line’, ‘bar’, ‘barh’}

Although this is out of date.
"
