Miscellaneous updates for scoped symbols

Summary: Update Conduit, jump nav, and docs to handle symbol contexts.

Test Plan: Call conduit, use jump nav.

Reviewers: epriestley

Reviewed By: epriestley

CC: nh, aran, Korvin

Maniphest Tasks: T1602

Differential Revision: https://secure.phabricator.com/D3172