a simple addition on NSString to get a string with only the first letter
upper case. E.g., from "firstName" it makes "FirstName". Used for
automatically constructing setter-method selectors from property name ("setFirstName" out of "firstName").
Can it really be that this does not exist yet?!? At least I haven't found anything like this.
Note:
[NSString uppercaseString] makes all letters uppercase (FIRSTNAME)
and
[NSString capitalizeString] makes all other letters lowercase (Firstname)