More minor updates

There are a few more minor updates in this release. A notable API change is that plotting colormaps take strings instead of actual colormap instances. Everything important is in the changelog.

Minor Updates

This version just contains a few minor enhancements. Four changes that users may find helpful/want to know about are:

(1) A write_meta util function that takes an INS and a few other pieces as input and writes out a sensible set of files associated with it. This avoids the hassle of calling INS.write multiple times whenever wanting to save out data.

(2) MF objects can be read/written in yaml format, making it easier to transfer match filters from analysis to analysis.

(3) The extent options in the plotting libraries will make more sensible default ticks/ticklabels.

(4) INS.select can now operate inplace.