Docs cleanup
Remove section on using IPython demo.  This no longer works and is OBE.
Finish support for all combinations of filter_bad and bad_union
Add figures and associated script illustrating MSIDset.interpolate
Improve fetch tutorial documentation for interpolation
Fix regression problems
Add docs on estimating fetch size
Update version to 0.28
Add docs for get_telem
Change 'resample' to 'interpolate' for consistency