fixed case where get-key returns None
Build the dumplookup tool alongside the stackwalker
Modify dumplookup to accept multiple symbol paths
Merge pull request #2492 from twobraids/boto-get-key-returns-none

Fixes Bug 1102379 -  fixed case where get-key returns None
Merge pull request #2493 from luser/build-dump-lookup

Build dumplookup tool alongside stackwalker