Added Lots of Documentation

Added some nice to haves
Improved and Unified General Code Layout

MathKit/MPExpressionStorage.h

@@ -9,13 +9,51 @@
 #import "MPExpression.h"
 
 
+/*!
+ @header
+ This file contains the <code>MPExpressionStorage</code> class.
+ */
+
+
 
 @class MPExpressionStorage, MPExpressionView, MPExpressionLayout;
 
 
+/*!
+    @class      MPExpressionStorage
+    @abstract   An expression storage manages the contents of an expression view
+                and notifies it when the underlying expression changes.
+ */
 @interface MPExpressionStorage : MPExpression
 
-@property (nonatomic, weak) MPExpressionView *expressionView; // Do not set
+/*!
+    @property   expressionView
+    @abstract   The receiver's expression view.
+ 
+    @discussion The expression view is the view that displays the contents of the
+                expression storage. Normally you should not call the setter of
+                this property. It is automatically assigned when the <code>@link
+                //apple_ref/occ/instp/MPExpressionView/expressionStorage@/link</code>
+                property of the <code>@link
+                //apple_ref/occ/cl/MPExpressionView@/link</code> class is set.
+ 
+                When this property is set the receiver assumes that the
+                displaying expression view has changed. It then adapts to the
+                properties of the new expression view and discards the root
+                layout.
+ */
+@property (nonatomic, weak) MPExpressionView *expressionView;
+
+
+/*!
+    @property   rootLayout
+    @abstract   The receiver's root layout.
+ 
+    @discussion The root layout is the root node of the layout tree that draws
+                the receiver's contents. For more information see the
+                documentation on the <code>@link
+                //apple_ref/occ/cl/MPLayout@/link</code> class.
+ */
 @property (nonatomic, strong) MPExpressionLayout *rootLayout;
 
 @end