-Version 1.4.0:
-- Remove old API (all calls using crypt_options)
-- Support separation of metadata device
-- Wipe device flag
-- Add Natty crypto backend
+Version 1.6.0:
+- Export wipe device functions
+- Support K/M suffixes for align payload (new switch?).
+- FIPS: move changekey to library
+- online reencryption api?
+- integrate more metadata formats
+- TRIM for keyslots