Fundamental Redesign of the Model

Started to add Documentation

MathPad/MPFunction.m

@@ -24,6 +24,12 @@
 }
 
 #pragma mark Working With the Expression Tree
+- (NSIndexPath *)indexPath
+{
+    NSUInteger selfIndex = [self.parent indexOfElement:self];
+    return [[self.parent indexPath] indexPathByAddingIndex:selfIndex];
+}
+
 - (NSUInteger)numberOfChildren
 {
     return 0;