Trying out a new icon.
Trying out scikit-learn

Committing testing script for sklearn.  I have to admit though that I'm
not doing a good job with sklearn though.  Still at experimental stage.
Added results caching.

Personal and interpersonal displays will now save results to disk on
complete, then load from disk on the next open (with a refresh button to
force a recompute).  Should help anyone that has a lot of texts.
Sort contacts by name.
Started to add caching, still broken

The way I handled the help display has led to a crash in cached load;
need to fix that.
Updated icons

Updated refresh and help icons from Android downloadable sources.  Added
a blue refresh icon to show that there's new data.
Lang ID help now from strings.xml

Changed the language ID help to be built offline and baked into
strings.xml.
Reworked the refresh behavior

Moved lots of shared code to RefreshableActivity, including the refresh
handling.