Remove requrement to build Intents

====  Tech Notes ====
IntentBuilder objects always need to be built into an Intent to be
usable in mycroft. Since this is always neccessary the code doing this
can be moved so users don't need to do this step.

This commit makes the `register_intent()` method check the handler
argument type, if it's an IntentBuilder object it builds the Intent, if
it's an Intent it continues as normal, if it's any other type it will
raise a ValueError

mycroft/skills/core.py

@@ -26,7 +26,7 @@ from os.path import join, dirname, splitext, isdir
 
 from functools import wraps
 
-from adapt.intent import Intent
+from adapt.intent import Intent, IntentBuilder
 
 from mycroft.client.enclosure.api import EnclosureAPI
 from mycroft.configuration import ConfigurationManager
@@ -270,6 +270,22 @@ class MycroftSkill(object):
         _intent_list = []
 
     def register_intent(self, intent_parser, handler, need_self=False):
+        """
+            Register an Intent with the intent service.
+
+            Args:
+                intent_parser: Intent or IntentBuilder object to parse
+                               utterance for the handler.
+                handler:       handler_function
+                need_self:     optional parameter, when called from a decorated
+                               intent handler the function will need the self
+                               variable passed as well.
+        """
+        if type(intent_parser) == IntentBuilder:
+            intent_parser = intent_parser.build()
+        elif type(intent_parser) != Intent:
+            raise ValueError('intent_parser is not an Intent')
+
         name = intent_parser.name
         intent_parser.name = self.name + ':' + intent_parser.name
         self.emitter.emit(Message("register_intent", intent_parser.__dict__))