Added Lots of Documentation

Added some nice to haves
Improved and Unified General Code Layout

MathKit/MPFractionFunction.m

@@ -11,21 +11,26 @@
 #import "MPFractionTerm.h"
 #import "MPExpression.h"
 
+
+
 @implementation MPFractionFunction
 
 MPFunctionAccessorImplementation(NominatorExpression, _nominatorExpression)
 MPFunctionAccessorImplementation(DenominatorExpression, _denominatorExpression)
 
+
 - (NSArray *)childrenAccessors
 {
     return @[@"nominatorExpression", @"denominatorExpression"];
 }
 
+
 - (Class)functionTermClass
 {
     return [MPFractionTerm class];
 }
 
+
 - (NSString *)description
 {
     return [NSString stringWithFormat:@"%@ / %@", self.nominatorExpression, self.denominatorExpression];