In preparation for making some substantial changes to this piece of
code, I'm translating it to JS.

Consolidate .gitignore files

Auto re-install Python, Node deps if out of date

Having these scattered about across the repository makes it hard to work
out where something is ignored, and most tools/editors that read
.gitignore files don't pay attention to those not in the repository
root.

T87 - Improve group scope dropdown ui

For IE 10 and Safari < 9 support, use prefixed flexbox.

For now, this duplicates the flexbox declarations as is
done in topbar.scss. I will look into using autoprefixer for
this separately.

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cf410d0 broke standalone annotation pages by changing
`threadRoot.children` from an array into a thread container.
Unsurprisingly, `children` is supposed to be an array.

 * Use the singular 'groupList' everywhere

 * Simplify the logic for stopping click propagation
   when toggling the selected group

 * Remove underscore prefix for Controller classes as per the PR
   discussion.

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Fix detection of PDF URIs

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*N.B.* This does not fix the underlying problem, but it does make it
possible to deploy the existing codebase without breaking everything in
production.

70c9b9b broke a number of features of the h client that were toggled on
for PDF documents, by renaming the Annotator PDF plugin from
`Annotator.Plugin.PDF` to `Annotator.Plugin.Pdf`.

While it's certainly an ugly side-effect of a straightforward rename,
the problem is that `Guest#getDocumentInfo` (to pick one example) used
`@plugins.PDF?` to determine whether to use the PDF metadata
(provided by the PDF.js `PDFViewerApplication`).

In the absence of PDF metadata, `getDocumentInfo` falls back to using
`window.location.href`, which explains the behaviour identified
in #2506.

Fixes #2506.

Add a test for the controller part of the <groups-list> directive.

We have a couple of different patterns for testing directive
controllers in the code, the approach taken here follows the privacy
dropdown's directive in simply exporting the controller's constructor
as a 'private' export and referencing it directly in the test.

 * Rename the exports in the 'directive/privacy' module for consistency

 * Restructure the 'New group' item to make icon
   and label align with the items above it

 * Make the whole 'New group' section clickable

 * Make 'New group' icon bold for visual consistency
   with other icons

 * Use the prerendered group URL from the API instead
   of generating it locally

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 * Use an element directive for <group-list> for
   consistency with the <privacy> directive and because
   the directive has its own template.

 * Use flexbox for easier layout of items in the groups
   dropdown list.

 * Update the hover and selection states of items in the dropdown
   list as per the mocks.

 * Add descriptive titles to all links in the list

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 * Use the brand color for hovered items,
   including selected items.

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Use nesting for readability.

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Use a light grey background.

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Add make target to run karma tests with auto-watch enabled

Show orphan annotations with a notice

The positions of the anchors are no longer needed.

This provides a convenient way to start Karma tests and auto-run
them when test files are changed.

Because the test files are incorporated into a Browserify bundle
by karma-browserify which watches files for changes via watchify(),
we can turn off Karma's own watching of the test files.

This fixes a problem where changing a test spec file would result
in Karma running all the tests twice, once after the test spec file
changed and then again afterwards due to the browserify bundle
being updated a second or two after the test spec file changes.

DRY in .editorconfig and add SCSS settings

cf410d0 broke thread sorting by interfering with the (admittedly
arcane) sort apparatus.

There is a scope.watch in the AppController which is responsible for
filling the `predicate` field of the `sort` object when the `name` field
changes. In order for this to work, the controllers in child scopes
(namely StreamController or WidgetController) need to modify the `name`
property of the `sort` object in the parent scope, via prototypal
inheritance, rather than replacing the entire `sort` object.

Clean up socket, threading, mapper with routing

Move all the logic required to set up a clean environment for the
client views into the dependency resolution mechanism of ngRoute.

The annotation mapper gains an unloadAnnotations method to make the
isolated code cleaner.

Use angular-websocket to remove the need for our own socket class.

The AppController becomes much more sane.

Merge pull request #2475 from hypothesis/oWe60V8v-signal-when-there-are-public-annotations-on-a-page

Signal when there are public annotations on a page in the Chrome extension icon

I was getting multiple test fails on Travis that were not failing
locally, due to differences between my local Sinon and Travis's. Pinning
Sinon to the latest version fixes this.

Add a simple user info dashboard for admins

Allows administrators to look up user information from the
administration panel.

Close #1916

Installation docs corrections

Split host / sidebar and clean up plugin loading

Improve factoring of search/filtering

Refactor Pyramid routing and view configuration

Lenient search