Enhancements to Revel command

Reformat of code
Allow user to use a mix of command line arguments and flags
Enhance the import tool to detect missing packages in the modules side
Added test cases for all commands

model/event.go

@@ -0,0 +1,62 @@
+package model
+
+type (
+	// The event type
+	Event int
+	// The event response
+	EventResponse int
+	// The handler signature
+	EventHandler  func(typeOf Event, value interface{}) (responseOf EventResponse)
+	RevelCallback interface {
+		FireEvent(key Event, value interface{}) (response EventResponse)
+		PackageResolver(pkgName string) error
+	}
+)
+
+const (
+	// Event type when templates are going to be refreshed (receivers are registered template engines added to the template.engine conf option)
+	TEMPLATE_REFRESH_REQUESTED Event = iota
+	// Event type when templates are refreshed (receivers are registered template engines added to the template.engine conf option)
+	TEMPLATE_REFRESH_COMPLETED
+	// Event type before all module loads, events thrown to handlers added to AddInitEventHandler
+
+	// Event type before all module loads, events thrown to handlers added to AddInitEventHandler
+	REVEL_BEFORE_MODULES_LOADED
+	// Event type before module loads, events thrown to handlers added to AddInitEventHandler
+	REVEL_BEFORE_MODULE_LOADED
+	// Event type after module loads, events thrown to handlers added to AddInitEventHandler
+	REVEL_AFTER_MODULE_LOADED
+	// Event type after all module loads, events thrown to handlers added to AddInitEventHandler
+	REVEL_AFTER_MODULES_LOADED
+
+	// Event type before server engine is initialized, receivers are active server engine and handlers added to AddInitEventHandler
+	ENGINE_BEFORE_INITIALIZED
+	// Event type before server engine is started, receivers are active server engine and handlers added to AddInitEventHandler
+	ENGINE_STARTED
+	// Event type after server engine is stopped, receivers are active server engine and handlers added to AddInitEventHandler
+	ENGINE_SHUTDOWN
+
+	// Called before routes are refreshed
+	ROUTE_REFRESH_REQUESTED
+	// Called after routes have been refreshed
+	ROUTE_REFRESH_COMPLETED
+
+	// Fired when a panic is caught during the startup process
+	REVEL_FAILURE
+)
+
+var initEventList = []EventHandler{} // Event handler list for receiving events
+
+// Fires system events from revel
+func RaiseEvent(key Event, value interface{}) (response EventResponse) {
+	for _, handler := range initEventList {
+		response |= handler(key, value)
+	}
+	return
+}
+
+// Add event handler to listen for all system events
+func AddInitEventHandler(handler EventHandler) {
+	initEventList = append(initEventList, handler)
+	return
+}