Merge pull request #16 from e-koch/master

Added travis file.
Merge pull request #17 from e-koch/master

Added build status to README.
Merge pull request #18 from e-koch/master

Set number of decimal points to have in csv files.
Merge pull request #19 from e-koch/master

Added PDF distance metric and improved 2D support
Merge pull request #20 from e-koch/master

Update property_arrays to output consistent form
Merge pull request #21 from e-koch/master

Fixes to Genus Distance; Added run scripts for clusters
Merge pull request #22 from e-koch/master

Fixes for Dendrogram_Num, Genus, etc...
Merge pull request #23 from e-koch/master

Effects plotting. R Code
Merge pull request #24 from e-koch/master

Updated model plots.
Merge pull request #25 from e-koch/master

Fixed case where linewidth errors blow up.
Merge pull request #26 from e-koch/master

Assortment of updates
if the first channel is all zeros (e.g., padded to allow for different #
of slice sizes in VCA), need a different way to define good "channels"
(is the definition of channels right anyway?  seems like this is good
spatial pixels...)
do it for VCS too
Merge pull request #27 from keflavich/minorfix

Minor fix in VCS good channel selection