Modified documentation style a bit, and fixed some invalid documentation group parents

Documentation/Doxygen/doxystyle.css

@@ -44,7 +44,7 @@ div.contents {
 
 /* Nav bar */
 .tabs, .tabs2, .tabs3 {
-	background-color: rgba(0, 0, 0, 0.7);
+	background-color: rgba(0, 0, 0, 0.12);
 	background-image: none;
     font-family: Lato,'Lucida Grande',Geneva,Helvetica,Arial,sans-serif;
 	border-bottom: none;
@@ -58,20 +58,22 @@ div.contents {
 
 .tablist a {
 	background-image: none;
-	color: rgba(255, 255, 255, 0.9);
+	color: rgba(0, 0, 0, 0.58);
 	background: transparent;
 	text-shadow: none;
-	font-weight: normal;
+	font-weight: bold;
 }
 
 .tablist a:hover {
     background-image: none;
-	color: rgba(255, 255, 255, 0.9);
+	color: rgba(0, 0, 0, 0.58);
+	text-shadow: none;
 }
 
 .tablist li.current a {
     background-image: none;
 	text-shadow: none;
+	color: rgba(0, 0, 0, 0.58);
 }
 
 .tablist li:hover {

Source/BansheeCore/Include/BsCorePrerequisites.h

@@ -94,6 +94,11 @@
  *  @{
  */
 
+/** @defgroup Internal-Core Core
+ *	Second lowest layer that provides core engine functionality and abstract interfaces for various systems.
+ *  @{
+ */
+
 /** @defgroup Animation-Internal Animation
  *	Animation clips, skeletal and blend shape animation, animation playback, blending and other features.
  */
@@ -102,11 +107,6 @@
  *	Audio clips, 3D sound and music reproduction.
  */
 
-/** @defgroup Internal-Core Core
- *	Second lowest layer that provides core engine functionality and abstract interfaces for various systems.
- *  @{
- */
-
 /** @defgroup CoreThread-Internal Core thread
  *	Core objects and interaction with the core (rendering) thread.
  */

Source/BansheeEditor/Include/BsEditorPrerequisites.h

@@ -8,6 +8,11 @@
  *  @{
  */
 
+/** @defgroup Editor Editor
+ *	Functionality specific to the Banshee Editor.
+ *  @{
+ */
+
 /** @defgroup Application-Editor Application
  *  Entry point into the editor application.
  */
@@ -20,11 +25,6 @@
   *	Integration of the Banshee Editor with external code editors.
   */
 
-/** @defgroup Editor Editor
- *	Functionality specific to the Banshee Editor.
- *  @{
- */
-
 /** @defgroup EditorWindow EditorWindow
  *  Creating, managing and interacting with editor windows.
  */