Enable page navigation via URL fragment

The broadcasting of notifications didn't update properly and I couldn't
find a way to listen to $location updates. I replaced the three
intertwined directives with one controller and a bit more HTML code. Now
we have only one scope that listens to $location and all browser actions
like the back button is reflected in the page.

As nice side-effect, the menu links have now the right destination so
that you can copy the link and paste it into another browser window.

40 lines less code.

app/assets/javascripts/darkswarm/controllers/pageset_ctrl.js.coffee

@@ -0,0 +1,10 @@
+Darkswarm.controller "PagesetCtrl", ($scope, $location) ->
+  $scope.selected = ->
+    path = $location.path()?.match(/^\/\w+$/)?[0]
+    if path
+      path[1..]
+    else
+      $scope.defaultPage
+
+  $scope.selectDefault = (selection) ->
+    $scope.defaultPage = selection

app/assets/javascripts/darkswarm/directives/page.js.coffee

@@ -1,12 +0,0 @@
-Darkswarm.directive "page", ->
-  restrict: "C"
-  require: "^^pagesetCtrl"
-  scope:
-    name: "@"
-  link: (scope, element, attrs, ctrl) ->
-    element.on "click", ->
-      scope.$apply ->
-        ctrl.toggle(scope.name)
-
-    ctrl.registerSelectionListener (prefix, selection) ->
-      element.toggleClass('selected', selection == scope.name)

app/assets/javascripts/darkswarm/directives/page_view.js.coffee

@@ -1,11 +0,0 @@
-Darkswarm.directive "pageView", ->
-  restrict: "C"
-  require: "^^pagesetCtrl"
-  template: "<div ng-include='template'></div>"
-  scope:
-    templates: "="
-  link: (scope, element, attrs, ctrl) ->
-    scope.template = null
-
-    ctrl.registerSelectionListener (prefix, selection) ->
-      scope.template = "#{prefix}/#{selection}.html"

app/assets/javascripts/darkswarm/directives/pageset_ctrl.js.coffee

@@ -1,26 +0,0 @@
-Darkswarm.directive "pagesetCtrl", ($location) ->
-  restrict: "C"
-  scope:
-    id: "@"
-    selected: "@"
-    prefix: "@?"
-  controller: ($scope, $element) ->
-    path = $location.path()?.match(/^\/\w+$/)?[0]
-    $scope.selected = path[1..] if path
-
-    this.toggle = (name) ->
-      this.select(name)
-
-    this.select = (selection) ->
-      $scope.$broadcast("selection:changed", selection)
-      $element.toggleClass("expanded", selection?)
-      $location.path(selection)
-
-    this.registerSelectionListener = (callback) ->
-      $scope.$on "selection:changed", (event, selection) ->
-        callback($scope.prefix, selection)
-
-    this
-
-  link: (scope, element, attrs, ctrl) ->
-    ctrl.select(scope.selected) if scope.selected?