Fix client-side router on site

The JS for the group share page failed to load
because of an incorrect comparison of the result
of String.match() against a number and also
because of an attempt to load Bootstrap
unnecessarily on this pages.

This commit fixes the issue and prepares us for
adding new pages in future by:

 * Adding a client-side micro-router to simplify running
   page-specific JS

 * Only loading the Bootstrap components on pages that
   actually need it.

h/static/scripts/share-group-form.js

@@ -1,4 +1,7 @@
function ShareGroupFormController(element) {
  if (!element.querySelector('.is-member-of-group')) {
    return;
  }
  var shareLink = element.querySelector('.js-share-link');
  shareLink.focus();
  shareLink.select();

h/static/scripts/site.js

@@ -3,32 +3,31 @@ if (window.RAVEN_CONFIG) {
  require('./raven').init(window.RAVEN_CONFIG);
}

var page = require('page');

var CreateGroupFormController = require('./create-group-form');
var DropdownMenuController = require('./dropdown-menu');
var InstallerController = require('./installer-controller');
var ShareGroupFormController = require('./share-group-form');

// load our customized version of Bootstrap which
// provides a few basic UI components (eg. modal dialogs)
require('../styles/vendor/bootstrap/bootstrap');
// setup components
new DropdownMenuController(document);

function setupGroupsController(path) {
  if (path === '/groups/new') {
    new CreateGroupFormController(document.body);
  } else if (document.querySelector('.is-member-of-group')) {
    new ShareGroupFormController(document.body);
  }
}
page('/', function () {
  // load our customized version of Bootstrap which
  // provides a few basic UI components (eg. modal dialogs)
  require('../styles/vendor/bootstrap/bootstrap');
  new InstallerController(document.body);
});

document.addEventListener('DOMContentLoaded', function () {
  // setup components
  new DropdownMenuController(document);
page('/groups/new', function () {
  new CreateGroupFormController(document.body);
});

page('/groups/:id/:name', function () {
  new ShareGroupFormController(document.body);
});

  // setup route
  var route = document.location.pathname;
  if (route === '/') {
    new InstallerController(document.body);
  } else if (route.match('^/groups') === 0) {
    setupGroupsController(route);
  }
document.addEventListener('DOMContentLoaded', function () {
  page.start();
});

package.json

@@ -40,6 +40,7 @@
    "js-polyfills": "^0.1.11",
    "ng-tags-input": "2.2.0",
    "node-uuid": "^1.4.3",
    "page": "^1.6.4",
    "postcss": "^5.0.6",
    "raf": "^3.1.0",
    "raven-js": "^2.0.2",