Minor Cleanup on views, changing the default collection type and
initializing svg object only once.
Bugfix: Silently Drop "NAN" values returned from the database.  Can not
be used in computations.
Bugfix: Set default groupby_name to 'samplegroup'.
Cleanup: Start re-factoring of color palette object.  Necessary step to
remove sample names from SVG in order to place into the HTML