Use SHA-256 w/Fortuna; start 0.3.0.
More strictly follow Fortuna; reseed on every new request.
Use SHA-256 by default instead of SHA-1; expose createInstance.
Add example for creating new PRNG instance.
Allow PRNG to be given in options.
Ensure options are passed to RSA key gen state creation.
Add test verifying same RSA key can be generated w/same PRNG.
Release 0.3.0.
Start 0.3.1.