Fixed links to API in docstrings
Merge pull request #97 from astrofrog/fix-api-links-docstrings

Internal class references on doc pages should be links
Merge branch 'master' into tom_galactic

Adding some sexy functionality.
Intermediate, functional commit towards building multiple selections.
Intermediate attempt to get multiple selections working. The dictionary checking doesn't work yet (i.e. this is completely dysfunctional) but moving in the right direction I hope