v0.5: (Aug 2014)
  - support for brainpool curves added
  - compiles now with -std=c89 -pedantic
  - switch from GPLv2 to LGPLv3 license
  - minor bugfixes

v0.4: (Apr 2009)
  - signature generation is deterministic now
  - fix in the allocation routines for secure memory
  - minor bugfixes

v0.3: (Aug 2006)
  - added signcryption as shortcut for signing and subsequent encryption
  - added -a mode (inline signature)

v0.2: (Aug 2006)
  - added Diffie-Hellman key exchange

v0.1: (July 2006)
  - initial release
