Added formula for TCLAP, Templatized C++ Command Line Parser Library
From the documentation: "TCLAP is a small, flexible library that
provides a simple interface for defining and accessing command line
arguments. It was intially inspired by the user friendly CLAP libary.
The difference is that this library is templatized, so the argument
class is type independent. Type independence avoids
identical-except-for-type objects, such as IntArg, FloatArg, and
StringArg. While the library is not strictly compliant with the GNU or
POSIX standards, it is close"
ClosesHomebrew/homebrew#9065.
Signed-off-by: Jack Nagel <jacknagel@gmail.com>
