Added Lots of Documentation

Added some nice to haves
Improved and Unified General Code Layout

MathKit/MPFunctionsViewController.m

@@ -8,18 +8,21 @@
 
 #import "MPFunctionsViewController.h"
 
-#import "MPExpression.h"
-#import "NSString+MPExpressionElement.h"
 #import "MPFunction.h"
-#import "MPSumFunction.h"
+#import "MPFractionFunction.h"
 #import "MPParenthesisFunction.h"
 #import "MPPowerFunction.h"
-#import "MPFractionFunction.h"
+#import "MPSumFunction.h"
 
 #import "MPFunctionLayout.h"
 
+#import "NSString+MPExpressionElement.h"
+
+
+
 @class MPFunctionsCollectionView, MPFunctionTemplateView, MPFunctionTemplateItem;
 
+
 @interface MPFunctionsCollectionView : NSCollectionView
 
 @property (nonatomic, weak) MPFunctionTemplateItem *hoverItem;
@@ -30,6 +33,7 @@
 @end
 
 
+
 @interface MPFunctionTemplateView : NSView
 
 @property (nonatomic, strong) MPFunction *functionTemplate;
@@ -42,16 +46,20 @@
 
 
 @interface MPFunctionTemplateItem : NSCollectionViewItem
+
 @property (nonatomic, copy) NSString *templateName;
+
 @end
 
 
+
 @implementation MPFunctionsCollectionView
 
 - (void)mouseDown:(NSEvent *)theEvent
 {
 }
 
+
 - (void)mouseUp:(NSEvent *)theEvent
 {
     NSPoint pointInView = [self convertPoint:theEvent.locationInWindow
@@ -87,25 +95,30 @@
     [super updateTrackingAreas];
 }
 
+
 - (void)mouseEntered:(NSEvent *)theEvent
 {
     self.mouseOver = YES;
     self.needsDisplay = YES;
 }
 
+
 - (void)mouseExited:(NSEvent *)theEvent
 {
     self.mouseOver = NO;
     self.needsDisplay = YES;
 }
 
+
 - (void)setFunctionTemplate:(MPFunction *)functionTemplate
 {
     _functionTemplate = functionTemplate;
     _functionTemplateLayout = nil;
 }
 
+
 @synthesize functionTemplateLayout = _functionTemplateLayout;
+
 - (MPFunctionLayout *)functionTemplateLayout
 {
     
@@ -117,16 +130,19 @@
     return _functionTemplateLayout;
 }
 
+
 - (NSSize)intrinsicContentSize
 {
     return [self.functionTemplateLayout bounds].size;
 }
 
+
 - (BOOL)isOpaque
 {
     return NO;
 }
 
+
 - (void)drawRect:(NSRect)dirtyRect
 {
     if (self.mouseOver) {
@@ -150,11 +166,13 @@
 
 static void *MPFunctionTemplateViewMouseOverContext = @"MPFunctionTemplateViewMouseOverContext";
 
+
 - (id)awakeAfterUsingCoder:(NSCoder *)aDecoder
 {
     return [super awakeAfterUsingCoder:aDecoder];
 }
 
+
 - (void)observeValueForKeyPath:(NSString *)keyPath
                       ofObject:(id)object
                         change:(NSDictionary *)change
@@ -171,6 +189,7 @@ static void *MPFunctionTemplateViewMouseOverContext = @"MPFunctionTemplateViewMo
     }
 }
 
+
 - (void)setRepresentedObject:(id)representedObject
 {
     MPFunctionTemplateView *view = (MPFunctionTemplateView *)self.view;
@@ -191,6 +210,8 @@ static void *MPFunctionTemplateViewMouseOverContext = @"MPFunctionTemplateViewMo
 
 @end
 
+
+
 @implementation MPFunctionsViewController
 
 - (id)init
@@ -199,6 +220,7 @@ static void *MPFunctionTemplateViewMouseOverContext = @"MPFunctionTemplateViewMo
                           bundle:[NSBundle bundleForClass:[self class]]];
 }
 
+
 - (void)awakeFromNib
 {
     MPFunction *sumFunction = [[MPSumFunction alloc] init];
@@ -227,40 +249,45 @@ static void *MPFunctionTemplateViewMouseOverContext = @"MPFunctionTemplateViewMo
                           forKeyPath:@"hoverItem"
                              options:0
                              context:MPCollectionViewHoverItemChangeContext];
-    self.collectionView.target = self.target;
-    self.collectionView.action = self.action;
+    ((MPFunctionsCollectionView *)self.collectionView).target = self.target;
+    ((MPFunctionsCollectionView *)self.collectionView).action = self.action;
 }
 
+
 static void *MPCollectionViewHoverItemChangeContext = @"MPCollectionViewHoverItemChangeContext";
 
+
 - (void)setView:(NSView *)view
 {
     [super setView:view];
 }
 
+
 - (void)setTarget:(id)target
 {
     _target = target;
     if (self.collectionView) {
-        self.collectionView.target = target;
+        ((MPFunctionsCollectionView *)self.collectionView).target = target;
     }
 }
 
+
 - (void)setAction:(SEL)action
 {
     _action = action;
     if (self.collectionView) {
-        self.collectionView.action = action;
+        ((MPFunctionsCollectionView *)self.collectionView).action = action;
     }
 }
 
+
 - (void)observeValueForKeyPath:(NSString *)keyPath
                       ofObject:(id)object
                         change:(NSDictionary *)change
                        context:(void *)context
 {
     if (context == MPCollectionViewHoverItemChangeContext) {
-        self.currentDescription = self.collectionView.hoverItem.templateName;
+        self.currentDescription = ((MPFunctionsCollectionView *)self.collectionView).hoverItem.templateName;
     } else {
         [super observeValueForKeyPath:keyPath
                              ofObject:object