Big docs cleanup.

* Fixed headers including:
  - All rights reserved not All Rights Reserved.
  - name, [email protected] not name <[email protected]>
  - tabs and spaces
  - Authors: not Documented by:
* Renamed string.dox to String.dox
* Renamed midixxx.dox files to MidiXxx.dox
* Moved images into images subdirectories and updated Doxfile.
* Re-format all files with tabs instead of spaces.
* Fix many spelling mistakes.
* Added all files, classes, structs, and enums to libbe group.

docs/user/interface/Button.dox

@@ -1,9 +1,10 @@
 /*
- * Copyright 2011, Haiku inc.
+ * Copyright 2011 Haiku Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
- * Documentation by:
+ * Authors:
  *		John Scipione, [email protected]
+ *
  * Corresponds to:
  *		/trunk/headers/os/interface/Button.h	 rev 42794
  *		/trunk/src/kits/interface/Button.cpp	 rev 42794
@@ -11,6 +12,8 @@
 
 /*!
 	\file Button.h
+	\ingroup interface
+	\ingroup libbe
 	\brief Describes the BButton class.
 */
 
@@ -18,6 +21,7 @@
 /*!
 	\class BButton Button.h
 	\ingroup interface
+	\ingroup libbe
 	\brief A BButton is a labeled on-screen button.
 
 	A BButton control is used to initiate an action. An action is activated
@@ -29,8 +33,8 @@
 
 	A BButton, unlike other user interface elements such as check boxes and
 	radio buttons has only a single state. During a click event the
-	BButton's value is set to \c 1, (\c B_CONTROL_ON) otherwise this value
-	is \c 0 (\c B_CONTROL_OFF).
+	BButton's value is set to 1, (\c B_CONTROL_ON) otherwise this value
+	is 0 (\c B_CONTROL_OFF).
 
 	BButton inherits from the BControl class.
 */