Add source properties window (very preliminary)

- Add a properties window for sources so that you can now actually edit
   the settings for sources.  Also, display the source by itself in the
   window (Note: not working on mac, and possibly not working on linux).

   When changing the settings for a source, it will call
   obs_source_update on that source when you have modified any values
   automatically.

 - Add a properties 'widget', eventually I want to turn this in to a
   regular nice properties view like you'd see in the designer, but
   right now it just uses a form layout in a QScrollArea with regular
   controls to display the properties.  It's clunky but works for the
   time being.

 - Make it so that swap chains and the main graphics subsystem will
   automatically use at least one backbuffer if none was specified

 - Fix bug where displays weren't added to the main display array

 - Make it so that you can get the properties of a source via the actual
   pointer of a source/encoder/output in addition to being able to look
   up properties via identifier.

 - When registering source types, check for required functions (wasn't
   doing it before).  getheight/getwidth should not be optional if it's
   a video source as well.

 - Add an RAII OBSObj wrapper to obs.hpp for non-reference-counted
   libobs pointers

 - Add an RAII OBSSignal wrapper to obs.hpp for libobs signals to
   automatically disconnect them on destruction

 - Move the "scale and center" calculation in window-basic-main.cpp to
   its own function and in its own source file

 - Add an 'update' callback to WASAPI audio sources

libobs/obs.h

@@ -1,5 +1,5 @@
 /******************************************************************************
-    Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
+    Copyright (C) 2013-2014 by Hugh Bailey <obs.jim@gmail.com>
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -42,7 +42,7 @@ struct obs_encoder;
 struct obs_service;
 
 typedef struct obs_display    *obs_display_t;
-typedef struct obs_view   *obs_view_t;
+typedef struct obs_view       *obs_view_t;
 typedef struct obs_source     *obs_source_t;
 typedef struct obs_scene      *obs_scene_t;
 typedef struct obs_scene_item *obs_sceneitem_t;
@@ -438,13 +438,20 @@ EXPORT bool obs_source_removed(obs_source_t source);
 EXPORT uint32_t obs_source_get_output_flags(obs_source_t source);
 
 /** Gets the default settings for a source type */
-EXPORT obs_data_t obs_source_defaults(enum obs_source_type type,
+EXPORT obs_data_t obs_get_source_defaults(enum obs_source_type type,
 		const char *id);
 
 /** Returns the property list, if any.  Free with obs_properties_destroy */
-EXPORT obs_properties_t obs_source_properties(enum obs_source_type type,
+EXPORT obs_properties_t obs_get_source_properties(enum obs_source_type type,
 		const char *id, const char *locale);
 
+/**
+ * Returns the properties list for a specific existing source.  Free with
+ * obs_properties_destroy
+ */
+EXPORT obs_properties_t obs_source_properties(obs_source_t source,
+		const char *locale);
+
 /** Updates settings for this source */
 EXPORT void obs_source_update(obs_source_t source, obs_data_t settings);
 
@@ -662,7 +669,14 @@ EXPORT bool obs_output_active(obs_output_t output);
 EXPORT obs_data_t obs_output_defaults(const char *id);
 
 /** Returns the property list, if any.  Free with obs_properties_destroy */
-EXPORT obs_properties_t obs_output_properties(const char *id,
+EXPORT obs_properties_t obs_get_output_properties(const char *id,
+		const char *locale);
+
+/**
+ * Returns the property list of an existing output, if any.  Free with
+ * obs_properties_destroy
+ */
+EXPORT obs_properties_t obs_output_properties(obs_output_t output,
 		const char *locale);
 
 /** Updates the settings for this output context */
@@ -742,7 +756,14 @@ EXPORT void obs_encoder_stop(obs_encoder_t encoder,
 EXPORT obs_data_t obs_encoder_defaults(const char *id);
 
 /** Returns the property list, if any.  Free with obs_properties_destroy */
-EXPORT obs_properties_t obs_encoder_properties(const char *id,
+EXPORT obs_properties_t obs_get_encoder_properties(const char *id,
+		const char *locale);
+
+/**
+ * Returns the property list of an existing encoder, if any.  Free with
+ * obs_properties_destroy
+ */
+EXPORT obs_properties_t obs_encoder_properties(obs_encoder_t encoder,
 		const char *locale);
 
 /**