SOFTHSM-89: Adding constants for asymmetric algorithms.
SOFTHSM-89: Adding constants for asymmetric mechanisms.
SOFTHSM-89: Adding constants for RNG mechanisms
SOFTHSM-89: Adding constants for hash algorithms.
SOFTHSM-89: Adding constants for HMAC algorithms.
SOFTHSM-89: Adding constants for symmetric algorithms.
SOFTHSM-89: Adding constants for symmetric modes.
SOFTHSM-89: Adding constants for symmetric wrap modes.
SOFTHSM-89: Update the NEWS
Merge pull request #67 from bellgrim/SOFTHSM-89

SoftHSM-89: Use constants and not strings for signaling algorithms