Bug 747831 - Record buffer offset in ParseNodes instead of line number and column index (2nd attempt).  r=jorendorff.

--HG--
extra : rebase_source : 91591dfc8b7a9e0e73c0133915be1fff261e88a2
Bug 837292 - Part 2: Report new measurement version only; r=rnewman
Bug 837292 - Part 3: Add a TelemetryEnabled flag to FHR. r=gps
Bug 850483 - Record "blocklist enabled" flag in FHR; r=rnewman
Bug 837292 - Part 4: Followup to unbust part 2; r=rnewman
Bug 850450 - Longitudinal recording of build ID in FHR; r=rnewman
Merge mozilla-central into services-central
Bug 852208: Delete unused DebuggerServerConnection.prototype.addCleanup. r=past
Merge mozilla-central into inbound

--HG--
extra : rebase_source : f7e38cab743306482aa2e24d3b1fb9fd7e309133