Catch errors after our then()s, instead of in parallel with them (this missing exceptions)

When an error is thrown in a then() success handler, it doesn't call the same then()'s error handler.

I also made all of the utils.reject handlers verbose to aid in debugging.

IPython/html/static/widgets/js/manager.js

@@ -62,7 +62,7 @@ define([
                     dummy.replaceWith(view.$el);
                     view.trigger('displayed');
                     return view;
-                }, utils.reject('Could not display view'));
+                }).catch(utils.reject('Could not display view', true));
         }
     };
 
@@ -103,7 +103,7 @@ define([
                 view.listenTo(model, 'destroy', view.remove);
                 view.render();
                 return view;
-            }, utils.reject("Couldn't create a view for model id '" + String(model.id) + "'"));
+            }).catch(utils.reject("Couldn't create a view for model id '" + String(model.id) + "'", true));
         });
         return model.state_change;
     };
@@ -178,7 +178,7 @@ define([
         return this.create_model({
             model_name: msg.content.data.model_name, 
             model_module: msg.content.data.model_module, 
-            comm: comm}).catch(utils.reject("Couldn't create a model."));
+            comm: comm}).catch(utils.reject("Couldn't create a model.", true));
     };
 
     WidgetManager.prototype.create_model = function (options) {

IPython/html/static/widgets/js/widget.js

@@ -95,7 +95,7 @@ define(["widgets/js/manager",
                 } finally {
                     that.state_lock = null;
                 }
-            }, utils.reject("Couldn't set model state", true));
+            }).catch(utils.reject("Couldn't set model state", true));
         },
 
         _handle_status: function (msg, callbacks) {
@@ -309,7 +309,7 @@ define(["widgets/js/manager",
             // Create and promise that resolves to a child view of a given model
             var that = this;
             options = $.extend({ parent: this }, options || {});
-            return this.model.widget_manager.create_view(child_model, options).catch(utils.reject("Couldn't create child view"));
+            return this.model.widget_manager.create_view(child_model, options).catch(utils.reject("Couldn't create child view"), true);
         },
 
         callbacks: function(){

IPython/html/static/widgets/js/widget_box.js

@@ -75,7 +75,7 @@ define([
                     view.trigger('displayed');
                 });
                 return view;
-            }, utils.reject("Couldn't add child view to box", true));
+            }).catch(utils.reject("Couldn't add child view to box", true));
         },
         
         remove: function() {

IPython/html/static/widgets/js/widget_selectioncontainer.js

@@ -125,7 +125,7 @@ define([
                     view.trigger('displayed');
                 });
                 return view;
-            }, utils.reject("Couldn't add child view to box", true));
+            }).catch(utils.reject("Couldn't add child view to box", true));
         },
         
         remove: function() {
@@ -220,7 +220,7 @@ define([
                     view.trigger('displayed');
                 });
                 return view;
-            }, utils.reject("Couldn't add child view to box", true));
+            }).catch(utils.reject("Couldn't add child view to box", true));
         },
 
         update: function(options) {