Added Lots of Documentation

Added some nice to haves
Improved and Unified General Code Layout

MathKit/MPMathRules.h

@@ -7,25 +7,49 @@
 //
 
 
+/*!
+ @header
+ This file contains the <code>MPMathRules</code> class.
+ */
 
-FOUNDATION_EXPORT NSString *MPMathRulesMaximumOperatorChainLengthKey;
-FOUNDATION_EXPORT NSString *MPMathRulesMaximumOperatorChainLengthInMultiplicationKey;
+
+/*!
+    @const      MPMathRulesIsUsingDegreesKey
+    @abstract   Predefined key that is used to store the properties of the
+                <code>MPMathRules</code> class in the <code>NSUserDefaults</code>
+                database.
+ */
 FOUNDATION_EXPORT NSString *MPMathRulesIsUsingDegreesKey;
 
 
+
 @class MPMathRules;
 
 
+/*!
+    @class      MPMathRules
+    @abstract   The math rules class stores global settings concerning
+                mathematical interpretations
+    
+    @discussion The <code>MPMathRules</code> class is a singletone class. There
+                can only exist one instance (the shared instance) at any time.
+ */
 @interface MPMathRules : NSObject
 
+/*!
+    @method     sharedRules
+    @abstract   Returnes the shared <code>MPMathRules</code> instance.
+ */
 + (MPMathRules *)sharedRules;
 
-@property (nonatomic, getter = isUsingUserDefaultValues) BOOL usingUserDefaultValues;
-
-// Default value uses the key "..." in NSUserDefaults or ... if the key does not exist.
-@property (nonatomic) NSUInteger maximumOperatorChainLength; // +--++-5 -> Chain length: 6, 2 default (sign of number and operator) (0 is invalid?)
-@property (nonatomic) NSUInteger maximumOperatorChainLengthInMultiplication; // Default: 1, 0 means actually 0
 
+/*!
+    @property   isUsingDegrees
+    @abstract   Specifies whether trigonometric functions use degree values.
+ 
+    @discussion If set to <code>NO</code> radians are used instead. The default
+                value is <code>NO</code>.
+ */
 @property (nonatomic) BOOL isUsingDegrees;
 
 @end