Fixes bug 921248 adding devices and graphics signature summary tables to backfill
ensured that jobs are ack'd even if the jobs fail
Fixes bug 926078 - updates stackwalker

The new stackwalker was updated in HG after we brought it into the
Socorro repo. This ports over those changes from https://hg.mozilla.org/users/tmielczarek_mozilla.com/minidump-stackwalk/rev/b99899ee43c7
Merge pull request #1582 from lonnen/926078-stackwalker

Fixes bug 926078 - updates stackwalker
enhancements to jDump processing - better sentinel detection
Merge pull request #1583 from twobraids/jDump3

Fixes Bug 926507 - enhancements to jDump processing
pep8 ftpscraper, r=AdrianGaudebert
Merge pull request #1557 from selenamarie/bug921248-fix-sigsum-devices-backfill

Fixes bug 921248 adding devices and graphics signature summary tables to...
(no bug) - docs update for GCC requirement

Building MDSW requires GCC 4.6 or greater.
Merge pull request #1584 from lonnen/docs

(no bug) - docs update for GCC requirement
fixes bug 889041 - return any raw field from report/list take 2, r=selenamarie
fixes bug 926945 - None type in API _scrub_list function
Merge pull request #1587 from peterbe/bug-926945-none-type-in-api-_scrub_list-function

fixes bug 926945 - None type in API _scrub_list function
Created failing test
Fixes 927120 - raise BadArgumentError when versions args are not correctly formatted
Fixes bug 926874 - Added more parameters for string fields. r=peterbe
restores legacy_processor back to pDump only
Merge pull request #1588 from selenamarie/bug97120-signature-url-error

Bug927120 signature url error
Revert "fixes bug 901177 - build system changes for json stackwalker"

This reverts commit ba51b1bd8d4598e9d9d347558502b73bc122b262.
Revert "fixes bug 901177 - no need to rename breakpad to stackwalk anymore"

This reverts commit 96e28fb99740a711c373b3e6aeee7f9a8a39eb31.