New functions

[Rikard Nordgren]

I have written some new functions for gmp that I thought were missing (some 
were suggested at the 'tasks' section). These are:

mpq_init_set_ui
mpq_init_set_si
mpq_init_set_str
mpq_init_set_z
mpq_init_set
mpz_set_str2
mpq_set_str2
mpz_init_set_str2
mpq_init_set_str2

The set_str2 functions take a string and a length as arguments instead of a 
null terminated string.
I also work on the mpz_scanx_reverse functions as proposed in the 'tasks'.
When these functions are tested where should I send them? (in one file?) 
Should I provide .texi documentation?


Rikard Nordgren

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