Reorganized File Structure

Added Documentation

MathKit/MPNumber.m

@@ -0,0 +1,32 @@
+//
+//  MPNumber.m
+//  MathPad
+//
+//  Created by Kim Wittenburg on 09.10.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import "MPNumber.h"
+
+#import "MPParsedExpression.h"
+
+#import "MPToken.h"
+
+@implementation MPNumber
+
+- (instancetype)initWithNumber:(NSDecimalNumber *)number
+{
+    self = [super init];
+    if (self) {
+        NSAssert(number != nil, @"number must not be nil.");
+        _number = number;
+    }
+    return self;
+}
+
+- (NSDecimalNumber *)doEvaluation:(NSError *__autoreleasing *)error
+{
+    return self.number;
+}
+
+@end