Inherit anything

[hadley]

• section (@inheritsSection ? #299)
• returns (Add @inheritReturns #298)
• slots
• fields
• methods (inheritSlots tag? #145)
• description
• details
• params
• seealso
• references

[hadley]

Inheriting slots and fields will be slightly complicated because they are nested in sections (in Rd files).

You probably will want to be able to inherit sections by name, so they might be more easily handled with their own @inheritSections tag. An additional complication is that section names tend to have spaces in them, so using space delimiters (like other tags) isn't going to work. Use commas instead?

[hadley]

Cleaning up this issue, and moving all @inheritSection related stuff to #513

[hadley]

I'm not going to both with the S4/ref class stuff for now