This is now just getting distracting amidst the more important
information that gets logged during a build.

Print the sidebar app URL and asset root URL that were baked into the
client after the first build.

This is useful to verify that the build was run with the expected
environment.

To facilitate testing the client on devices that are not the same as the
one the package server and Hypothesis dev server are running on, it is
useful to be able to set the hostname for URLs that point to the package
content server that `gulp watch` runs.

This commit adds support for setting this via a `PACKAGE_SERVER_HOSTNAME`
env var.

When building the client in development mode, make the client load
assets from the package content server by default.

Also if `H_SERVICE_URL` is set, bake that service's /app.html endpoint
into the boot script.

The live reload server's example page was modified to use a script tag
for config settings because the boot script currently only reads that
config source and does not use `window.hypothesisConfig()`.

In order to use the sidebar app from the local service, the service
needs to be configured to serve the local client by setting the
'CLIENT_URL' env var before running the devserver and in the client, the
'H_SERVICE_URL' env var needs to be pointed at the devserver host.

Make the package content server mirror unpkg's behavior in that:

 - The entry point for a package is located at `/{packageName}@{version}`

 - Requests without a package version specified redirect to the
   corresponding path for the latest package version

Add an express server which serve's the package's contents in a manner
similar to unpkg:

 - The '/' route serves the package's entry point script

 - Other routes serve files from the package

This can be used together with the CLIENT_URL setting in the Hypothesis
service to configure the service to serve the local development version
of the client instead of the production version.

Fix PDF quote anchoring

See https://github.com/hypothesis/client/pull/261#discussion_r103251150

The previous syntax ended up executing:

  docker run -d hypothesis s3://cdn.hypothes.is nickstenning/s3-npm-publish

So `hypothesis` was interpreted as the Docker image name instead of an
argument. Passing the args as the second ('command') argument to
`Image.withRun` results in the correct command being executed:

  docker run -d nickstenning/s3-npm-publish hypothesis s3://cdn.hypothes.is

Upload the client to the S3 bucket behind cdn.hypothes.is after
publishing to npm. The service will then redirect requests for /embed.js
to cdn.hypothes.is/hypothesis

We decided to publish the client's assets to a Hypothesis-specific
domain because publishers (eg. https://internethealthreport.org) may
want to use CSP to restrict where assets are loaded from and they won't
want to whitelist the whole of npm.

This also gives us better control over caching headers used on assets.

Improves performance and includes a number of bug fixes. See
https://github.com/showdownjs/showdown/blob/master/CHANGELOG.md for
changes.

Several tests required small changes because the rendering of
`para1\n\npara2` changed from:

  `<p>para1</p>\n\n<p>para2</p>`

To the visually equivalent:

  `<p>para1</p>\n<p>para2</p>`

This test fails without the `toPositionAnchor` fix in the previous
commit.

This method used to exist in the `dom-anchor-text-quote` library but got
lost when the class was moved to a wrapper in `types.coffee` after the
upgrade to dom-anchor-text-quote v3.x.

This method is used by PDF anchoring and its absence caused quote
anchoring to throw an exception. The majority of PDF annotations still
continued to anchor because the position anchor still worked.

This commit also adds some basic documentation to the `types` module and
some basic API tests.

Make this file easier to understand for the next person who tries to
read it.

The release notes were missing on the GitHub Releases page for the
client for several recent releases. This happened because of incorrect
heading levels used for subsections within a release in the CHANGELOG
file.

Don't treat annotation quotes (TextQuoteSelector.exact) as HTML

The annotation quote, as plucked from the TextQuoteSelector, is not
HTML, and so shouldn't be rendered as such.

Fixes hypothesis/h#2896.

Add invisible threads list to allow render time saving for out of vie…

Add a new entry point script for the client application

Remove account settings and logout link from login control for 3rd pa…

For 3rd party users:
Remove the 'Account settings' link from the account menu
Remove the logout link from the account menu

Related PR:
https://github.com/hypothesis/client/pull/228

Fixes:
hypothesis/product-backlog#141

Disable the link to activity pages from user profile, if the user is …

correcting CC0 terminology