Add `console.probe()` API and inspector instrumentation to plumb
samples towards the inspector infrastructure.
Add probe agent for inspector, dummy DataProbe interface, and
stubbed-out Probe inspector protocol domain.
Reimplement DOMTimer capture and replay.

The old implementation bitrotted with upstream changes to how timer ids
were acquired. The code was getting hairy, so it's been re-implemented
with `DOMTimer` subclasses. Timer id acquisition and initial scheduling
has been moved out of the constructor.

Closes #263.
Flesh out the implementation of ScriptProbeServer so that it looks up
and samples applicable probes during execution.

Add machinery to ProbeAgent so it can resolve and modify probes as
scripts are loaded or destroyed.
Remove code that attempts to disable the WebProcess sandbox when
ENABLE(TIMELAPSE), since it doesn't actually do so. This was somehow
causing file:/// resources to fail to load.
Remove ENABLE(TIMELAPSE) guards from changes to JSGlobalObject. Move
RiggedWeakRandom into WeakRandom.

ENABLE defines are not used by command-line jsc, so when Timelapse
support is specified, jsc will use a different header with different
JSGlobalObject members, and segfault at runtime.
Previous commit missed most changes; this commit contains the rest
(and fixes the build).
Update README to have binary download links; update dependencies
Frontend: Fix regression in column widths for recording panel's table
of inputs.
Update nightly build script and inspector sync script.
Fix mis-merges and minification problems for profile-related parts of
the inspector.
Fix renaming regressions related to Profiles panel.
bump nightly inspector version
Merge from upstream.
update recordings panel landing screen
Revert "update recordings panel landing screen"

This reverts commit 62c299456f2304d7d23225172f50fd6a5b8a258e.
Add context menus to the Recordings panel. Stub out various file save/load code paths.

Closes #237.
Remove code that unconditionally saves recordings to disk, because it doesn't work any more. Change JSONInputSerializer to serialize to a string. Remove serialization code from ReplayController.

Closes #266.
Remove some trailing whitespace.
Reimplement slider animations using requestAnimationFrame.

Closes #258.