RSA cryptosystem
Test for is_prime
gdc implemented
Euler function implemented
Random ul digit generator implemented
generate keys done
Replace gcd to Extended Euclid algorithm
Large Integer Arithmetic implemented
Fix warning on gcc
Tests for BigInteger
Extend Big integer - added power methods(ugly code)
Improve BigInteget: added is_prime method, based on miller rabin theory
Tests for BigInteger::power()
tests for is_prime