Catch trailing / before query building streamer

Closes #1086

h/js/controllers.coffee

@@ -468,7 +468,7 @@ class App
           .addClause('uri', 'one_of', Object.keys(annotator.plugins.Store.entities))
           .getFilter()
 
-      streamerURI = baseURI.replace /\/\w+(\??[^\/]*)\/$/, '/__streamer__'
+      streamerURI = baseURI.replace /\/\w+(\/?\??[^\/]*)\/?$/, '/__streamer__'
       $scope.updater = new SockJS streamerURI
 
       $scope.updater.onopen = =>

h/js/displayer.coffee

@@ -14,9 +14,7 @@ class Displayer
   this.$inject = ['$scope','$element','$timeout','baseURI', 'streamfilter']
   constructor: ($scope, $element, $timeout, baseURI, streamfilter) ->
     # Set streamer url
-    init_path = document.init_path
-    @path = baseURI[..-(init_path.toString().length)] + '__streamer__'
-    delete document.init_path
+    streamerURI = baseURI.replace /\/\w+(\/?\??[^\/]*)\/?$/, '/__streamer__'
 
     # Generate client ID
     buffer = new Array(16)
@@ -51,7 +49,7 @@ class Displayer
       to_change.reply_count = reply_count
 
     $scope.open = =>
-      $scope.sock = new SockJS @path
+      $scope.sock = new SockJS streamerURI
 
       $scope.sock.onopen = =>
         sockmsg =

h/js/streamsearch.coffee

@@ -221,7 +221,7 @@ class StreamSearch
       if $scope.sock? then $scope.sock.close()
       $scope.annotations = new Array()
 
-      streamerURI = baseURI.replace /\/\w+(\??[^\/]*)\/$/, '/__streamer__'
+      streamerURI = baseURI.replace /\/\w+(\/?\??[^\/]*)\/?$/, '/__streamer__'
       $scope.sock = new SockJS streamerURI
 
       $scope.sock.onopen = =>