fixing handling of the 'colors' trait in ContourLinePlot.  It now accepts lists or tuples of 3 or 4 numbers.
fixing handling of the 'colors' trait in ContourLinePlot.  It now accepts lists or tuples of 3 or 4 numbers.

burnpanck/chaco,burnpanck/chaco,tommy-u/chaco,tommy-u/chaco,tommy-u/chaco,ContinuumIO/chaco,ContinuumIO/chaco,burnpanck/chaco,ContinuumIO/chaco,ContinuumIO/chaco