unit doc
Add show to quickplot. Closes #607.
Merge pull request #613 from ajdawson/quickplot-show

Add show to quickplot. Closes #607.
Merge pull request #614 from cpelley/coord_from_coord_bug

BUG: creating coordinate from another crs copy
Added function to display differences between cubes that prevent compatibility.
Merge pull request #580 from bblay/unitdoc

Tweak unit docs
Merge pull request #462 from niallrobinson/verbose_is_compatible

Added verbose functionality to is_compatible
ENH: Allow cube slicing by dimension index

Currently only coordinates can be used to slice a given cube.  Since
coordinates are not allways associated with dimensions of a cube, the
ability to specify dimension and or mix of coordinate and dimension is
added here to facilitate use.