merging in remote changes
Adding more NSDecimal functions
Updated project settings.
Converting to modern literal syntax
Clean up the implementation of random().  Fixes #34.
Implement some more high-precision trig functions
What could be more worthwhile than rewriting comments?
Use new high-precision functions
Function resolution should pass variables through
Modernize ARCHS setting
Exploring parsing strings as variables.

@"\"Foo\" + \"Bar\"" would be equivalent to @"$Foo + $Bar"
Pruning unused methods from the tokenizer
Reparenting DDMathStringTokenizer
Renaming methods to conform to what NSEnumerator declares
Moving ivars to inside @implementation blocks
Modernizing some syntax
The future is ARC.
Modernizing some syntax
Deprecating +sharedMathEvaluator.

The name is wrong.  +shared* implies a singleton, which this is not.  The proper name is +defaultMathEvaluator (like +[NSFileManager defaultManager])
Minor type changes