Solved issue #53

Solved 2 Xcode Compiler warnings for 64-bit architecture, by using correct data type NSUInteger instead of int:

1) MLPAutoCompleteTextField/NSString+Levenshtein.m:87:13: Implicit conversion loses integer precision: 'NSUInteger' (aka 'unsigned long') to 'int'

2) MLPAutoCompleteTextField/NSString+Levenshtein.m:88:13: Implicit conversion loses integer precision: 'NSUInteger' (aka 'unsigned long') to 'int'
Solved issue #53

Solved 1 Xcode Compiler warning for 64-bit architecture, by using correct data type (long):

MLPAutoCompleteTextField/MLPAutoCompleteTextField.m:239:50: Values of type 'NSInteger' should not be used as format arguments; add an explicit cast to 'long' instead
Merge pull request #55 from funnel20/master

Solution for issue #53