Slight doc string change for html builds
read→measure for Keithley195 examples
First step in removing instruments.other.
Forgot one or two. Now imports OK.
Took advantage of new newport/ pkg to separate out NewportError.
Added deprecation warning to instruments.other.
Forgot to remove old crap.
Merged dev into feature-axis.
Started docs on axes to serve as design doc.
Continued work on axis/axislist classes, incl. integrating NewportESP301.