Merge pull request #13 from financeCoding/master

update for pub release
This is the main commit: it fixes bugs and compilation issues
This commit adds some things I need from bignum to make use of it in cipher
This commit removes fixnum inline sources and starts to make use of pub’s fixnum package
This commit updates unittest package version
This commit effectively removes all crypto code (RSA and SecureRandom) from bignum to be able to use it from cipher package
Merge pull request #14 from izaera/master

Some bug fixes and other proposals for better compatibility between bignum and cipher
publish new version of bignum