adding in notes
re-wrote the creation of the new, shifted mapcube.  Tests for applying shifts
fixed first working mapcube solar derotate
fix to apply shifts to get the right data clipped; still need to fix positioning information
removed prints used in debugging
adding in test code for solar derotate
adding in test code for solar derotate
tests for solar differential of mapcubes
fixed tests to properly count the number of maps
removed position.py - this code functionality is now the function '_sun_pos' in /physics/transforms/differential_rotation.py
removed unnecessary import of matplotlib
added in documentation for the mapcube solar derotation function
removed last line
small change to documentation
a fix for the differential rotation testing
another simpler fix for the differential rotation testing
small change to docs
small change to docs
Merge pull request #1176 from wafels/ji_diff_rot3

Application of solar rotation compensation to mapcubes