Prevent negative interactions with module systems present in injected
pages and refactor browserify interactions with angular to increase
CommonJS accessibility / legibility and isolate angular module system
boilerplate.

- Avoid issues due to mis-detected module environments

  - In the injection script, load only Annotator and jQuery in the
    global scope and then both removed with `noConflict()`. Both are
    loaded with browserify-shim, which prevents jQuery from registering
    itself against require.js, if present (fix #2026).

  - Be explicit about registration of common cross-frame components
    (fix #2090).

    - Lift angular glue into app.coffee. Individual components are
      exported as CommonJS modules.

    - Lift Annotator glue into bootstrap.js (renamed hypothesis.js).

- Break up all modules that contained multiple services/directives/etc,
  such as the formHelpers and uiHelpers modules, as well as catch-all
  files like services.coffee and directives.coffee. For a summary of
  these movements see the bottom of this commit message.

- Rename all services, dropping the -service suffix, to match their
  injected names. This is consistent with how directives are being
  treated, and controllers as well (controllers are registered and
  injected done with the "Controller" suffix).

- Move Annotator subclasses into the annotator subdirectory. This
  change avoids having `Annotator.Host` clash with the `host`
  service and makes it easy to glob dependencies in assets.yaml to
  minimally rebuild either the app or the inject.

---

Summary of structural reorganisation. Modules that have been trivially
renamed (from "foo-service" to "foo") are not included in this list:

    controllers:AppController                   app-controller
    controllers:AnnotationUIController          annotation-ui-controller
    controllers:AnnotationViewerController      annotation-viewer-controller
    controllers:ViewerController                widget-controller

    directives:match                            directive/match
    directives:repeatAnim                       directive/repeat-anim
    directives:whenscrolled                     directive/whenscrolled

    directives/thread:pulse                     pulse

    filters:Converter                           filter/converter
    filters:momentFilter                        filter/moment
    filters:personaFilter                       filter/persona
    filters:urlEncodeFilter                     filter/urlencode

    guest                                       annotator/guest
    host                                        annotator/host

    helpers/form-helpers:createFormHelpers      form-respond
    helpers/form-helpers:formInput              directive/form-input
    helpers/form-helpers:formValidate           directive/form-validate
    helpers/string-helpers:createStringHelpers  unicode
    helpers/tag-helpers                         tags
    helpers/time-helpers                        time
    helpers/ui-helpers:tabbable                 directive/tabbable
    helpers/ui-helpers:tabReveal                directive/tab-reveal

    searchfilters:QueryParser                   query-parser
    searchfilters:SearchFilter                  search-filter
    searchfilters:StreamFilter                  stream-filter

    services:DraftProvider                      drafts
    services:ViewFilter                         view-filter
    services:renderFactory                      render

    session/session-service                     session

    streamsearch                                stream-controller