fix map test fails introduced by astropying quantity objects
Merge pull request #679 from Cadair/master

fix map test fails introduced by astropying quantity objects
Merge pull request #695 from Cadair/doc_sprint

Prep for the Documentation Sprint
Merge pull request #698 from Cadair/doc_sprint

refactor guide
DocSprint: citation up to date - resolves #693
DocSprint: citation - lines break added for easier track
Merge pull request #699 from dpshelio/doc_reference

DocSprint: citation up to date
Merge remote-tracking branch 'upstream/documentation_sprint' into doc_sprint