Adding "AddNewTodoItemActivity" blank activity
Implementing AddNewTodoItemActivity functionality and updating
TodoListManagerActivity to use it
removing edtNewItem from activity_todo_list_manager
Changing list_item layout (from TextView) to now contain two TextViews
for title & date.
Creating ListItem class for the adapter to be able to support the
list_item.
Changing the adaper to be a generic colored array adapter & creating
interface for supporting the color functionality
Minor code refactoring