Added Additional Fuctionality to Jump Nav: Jump to users, projects, symbols, or

create new tasks

Summary: see title

Test Plan: Tested jump nav and found the correct urls were being loaded. Old
functionality was not effected.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: ddfisher, allenjohnashton, kpark517, aran, epriestley

Differential Revision: https://secure.phabricator.com/D1642

src/docs/userguide/jump.diviner

@@ -18,4 +18,11 @@ a navigational command into the box and press return.
   - **r** - Jump to Diffusion.
   - **rXYZ** - Jump to Diffusion Repository XYZ.
   - **rXYZabcdef** - Jump to Diffusion Commit rXYZabcdef.
-  - **(default)** - Search for input.
+  - **u** - Jump to People
+  - **u username** - Jump to username's Profile
+  - **p** - Jump to Project
+  - **p Some Project** - Jump to Project: Some Project
+  - **s SymbolName** - Jump to Symbol SymbolName
+  - **task: (new title)** - Jumps to Task Creation Page with pre-filled
+    title.
+  - **(default)** - Search for input.