Tiled Gallery: Don't wait for all images to load.

No need to wait for all images to load since we know their dimensions to begin with.
Tiled Gallery: JS object represents one gallery.

Refactored the Tiled Gallery prototype to represent a single tiled gallery as the name implies, and added a separate prototype to represent a collection of tiled galleries. This way it's clear which operations are done for individual galleries and which are done for all.
Tiled Gallery: Less responsibility for resize.

Extracted original-width and original-height attribute setting out of the resize function, and moved the call from resize to the constructor, since there is no need to see if the attributes are set in every resize call.
Tiled Gallery: Refactoring maybeSetSizeAttributes.

Made small changes to refactor the logic in maybeSetAttributes, since it was unnecessarily verbose.
Include link to Subscription email customization settings

As per #4367-wpcom; kudos to @jeherve for starting a patch, but it was
incomplete so I added more to it.
Merge pull request #483 from richardmtl/4367-wpcom

Include link to Subscription email customization settings
Correct how we're specifying the `wpcom_blog_id`.

I added this in 6ec05b51a740ab0e036db9ad5fcdcc42f68ab0e1 but didn’t
realize that `$args[‘blog_id’] was meant for local multisite installs,
not the wpcom blog id.
Added featured modules back into JP homepage

Featured modules section allows us to highlight some of the benefits of
Jetpack without jumping straight to a module listing.
Merge pull request #487 from Automattic/ui-tweaks-dave

Added featured modules back into JP homepage
Merge pull request #488 from Automattic/ui-tweaks-dave

Real-time module search
Real-time module search

No reason to force them to hit enter for the search to start filtering
results.
Fixed left nav & smoother mobile scrolling

- Made main wp-admin left nav fixed again
- Also resolved jerky scrolling in iOS

The one downside is that the little marker arrow in the “Jetpack” menu
item in the left nav is white which doesn’t look as good against the
green header area on the right.  It’s not too distracting though, and
is better than changing up the left nav so that it’s absolutely
positioned just on the JP admin pages.
Merge pull request #489 from Automattic/ui-tweaks-dave

Fixed left nav & smoother mobile scrolling
Tidy up how we concatenate host and path.

props @westi

Merges r96399-wpcom.
Merges r96400-wpcom.
REST API: versioning support for REST API endpoint

Props @jonathansadowski @jkudish

Merges r96274-wpcom.
Merges r96288-wpcom.
Merges r96289-wpcom.
Merge pull request #490 from Automattic/wpcom-merge-april-23-george

Merge a couple changes in from wpcom
Infinite Scroll: ensure click handler is removed when IS is rendering the button (default behaviour)

Since the removal is within a click handler, `this` is no longer the proper scope for our needs. As a result, the "load more" button isn't removed and multiple copies will be present on the page. Introduced in r95922.

See #28321-z.

Merges r96156-wpcom.
Infinite Scroll: bump up the default footer width to accommodate longer footer links.

See http://[private link] and r96337.

Merges r96380-wpcom.
Google+ Authorship

Add an option to still enable G+ but hide from display (still adds link attribute to header, etc).

See https://[private link] requested by matt.

Merges r96140-wpcom.
Sharing Buttons

Update size of the smart pinterest button so its not stretched.

Merges r96128-wpcom.