Added stand-alone RSA/PSS implementation.
Added support code for RSA and EC key encoding (including reconstruction of all public and private key elements from the private key structure), with raw and PKCS#8 formats, both in DER and PEM.
Added RSA/OAEP implementation.
New "i62" code for big integers with 64x64->128 opcodes; also improved "i31" modular exponentiation.
Added AES+GHASH implementation using AES-NI opcodes; also ARM-Thumb assembly for faster Montgomery multiplication on Cortex-M0+. Added selection functions for "default" implementations.
New "i15" implementation of big integers (faster, and constant-time, on ARM Cortex M0/M0+); imported into EC, ECDSA, RSA.