Added Lots of Documentation

Added some nice to haves
Improved and Unified General Code Layout

MathKit/MPExpressionLayout.m

@@ -9,21 +9,23 @@
 #import "MPExpressionLayout.h"
 
 #import "MPExpression.h"
-#import "MPExpression.h"
-#import "MPPowerFunction.h"
-
+#import "MPFunction.h"
 #import "MPFunctionLayout.h"
 #import "MPPowerFunctionLayout.h"
 
 #import "MPToken.h"
 #import "NSIndexPath+MPAdditions.h"
 
+
+
 @interface MPExpressionLayout (MPLineGeneration)
 
 - (CTLineRef)lineForElementAtIndex:(NSUInteger)index;
 
 @end
 
+
+
 @implementation MPExpressionLayout (MPLineGeneration)
 
 - (CTLineRef)lineForElementAtIndex:(NSUInteger)index
@@ -60,9 +62,13 @@
 
 @end
 
+
+
 @implementation MPExpressionLayout
 
 # pragma mark Creation Methods
+
+
 - (instancetype)initWithExpression:(MPExpression *)expression
                             parent:(MPFunctionLayout *)parent
 {
@@ -73,12 +79,16 @@
     return self;
 }
 
+
 #pragma mark Cache Methods
+
+
 - (NSUInteger)numberOfChildren
 {
     return self.expression.countElements;
 }
 
+
 - (MPLayout *)childLayoutAtIndex:(NSUInteger)index
 {
     id cachedObject = [self cachableObjectForIndex:index generator:^id{
@@ -95,6 +105,7 @@
     return nil;
 }
 
+
 - (NSRect)boundsOfElementAtIndex:(NSUInteger)index
 {
     id symbol = [self.expression elementAtIndex:index];
@@ -109,7 +120,10 @@
     }
 }
 
+
 #pragma mark Drawing Methods
+
+
 - (NSRect)generateBounds
 {
     if (self.expression.countElements == 0) {
@@ -125,6 +139,7 @@
     return NSMakeRect(x, y, width, height);
 }
 
+
 - (NSRect)boundingRectForRange:(NSRange)range
 {
     NSUInteger startOffset;
@@ -184,6 +199,7 @@
     return NSMakeRect(x, self.bounds.origin.y, width, self.bounds.size.height);
 }
 
+
 - (NSPoint)offsetOfChildLayoutAtIndex:(NSUInteger)index
 {
     CGFloat x = 0;
@@ -193,6 +209,7 @@
     return NSMakePoint(x, 0);
 }
 
+
 - (NSIndexPath *)indexPathForMousePoint:(NSPoint)point
 {
     NSUInteger currentPosition = 0;
@@ -235,11 +252,13 @@
     }
 }
 
+
 - (BOOL)drawsChildrenManually
 {
     return YES;
 }
 
+
 - (void)draw
 {
     // Get the current context