Bring outlines back into Prawn, keeping the low level PDF objects in PDF::Core
Clarify documentation for Outline and mark as stable API
Remove unnecessary require
Remove unnecessary delegator call
Don't include a module for the sole purpose of making constant lookup more convenient
Drop group manual entry.
Kill reference to group feature in summary page
Update Prawn::Images#image method documentation to be more precise
Merge pull request #687 from mogest/master

Update Prawn::Images#image method documentation to be more precise
Merge branch 'master' of github.com:prawnpdf/prawn into anchor