added pragma for vim noexpandtab

tabified recent changes to be consistent with
previous style.

Added docs for FramedArray
docs for _ConfAttributes and _PlotContainer.  Fix some tab/space issues
docs for _ConfAttributes
fix bug with indent
docs for FramedPlot, Histogram
docs for Histogram, Points and Point
docs for ColoredPoints, ColoredPoint
docs for Density
docs for Density
docs for Contours
doc on Contour
make sure not to expand tabs.  added vim pragma
Merge pull request #8 from esheldon/master

Adds docs to many classes and functions.  Make sure no expandtab