Synopsis:

       fp_decs(places)

Arguments:

       places - The default number of decimal places for the library

Description:  This function sets the default number of decimal places that will be returned by the library function calls.    Note that this is a global setting and will effect all calls to the library.    By default all functions will return results to two decimal places unless changed by this function (or if specified explicitly in the function call).       The number of decimals can be set to any value between 0 and 9 inclusive.

Returns:   Returns 0