0.05
 - Requires mpfr-2.0.3
 - Add 'Rmpfr_out_str()'
 - Add 'Rmpfr_get_default_rounding_mode()'
 - Rename 'Rmpfr_set_str_raw()' to 'Rmpfr_set_str_binary()'
   in keeping with changes to the MPFR library.
 - Alter 'Rmpfr_check_range()' in keeping with change to 
   'mpfr_check_range()' in the MPFR library.
 - Introduce operator overloading.

0.06
 - Add 'Rmpfr_gamma()', 'Rmpfr_zeta()', and 'Rmpfr_erf()'.
 - Add overloading for 'atan2', 'cos', 'sin', 'log', 'exp', and 'int'.

0.07
 - Replace 'Rmpfr_round_prec' with 'Rmpfr_prec_round' in keeping 
   with changes to the MPFR library.
 - Remove 'Rmpfr_random' (deprecated).
 - Add 'Rmpfr_cbrt', 'Rmpfr_cmpabs', ', 'Rmpfr_greater_p',
   'Rmpfr_greaterequal_p', 'Rmpfr_less_p', 'Rmpfr_lessequal_p',
   'Rmpfr_lessgreater_p', 'Rmpfr_equal_p', 'Rmpfr_unordered_p',
   'Rmpfr_inp_str', 'Rmpfr_frac', 'Rmpfr_integer_p',
   'Rmpfr_nexttoward', 'Rmpfr_nextabove', 'Rmpfr_next_below',
   'Rmpfr_min', 'Rmpfr_max', 'Rmpfr_get_exp', 'Rmpfr_set_exp'
   'Rgmp_randinit_default', 'Rgmp_randinit_lc_2exp',
   'Rgmp_randinit_lc_2exp_size', 'Rgmp_randseed', 'Rgmp_randseed_ui',
   'Rgmp_randclear'.
 - Change module name from 'Math::GnuMPfr' to 'Math::MPFR'.

1.01
 - Eradicate segfault that was occurring when 'overload_add',
   'overload_sub', 'overload_mul', 'overload_div' and 'overload_pow'
   croaked due to invalid argument(s).

1.02
 - Make overloading work with strings.
 - Add 'Rmpfr_dump'.
 - Add 'Math::MPFR::gmp_v' (not exportable).

1.03
 - Replace 'SvROK()' with 'sv_isobject()' in the overload functions.
 - Make 'get_refcnt()' and 'get_package_name()' non-exportable.