nocamlp4

no longer camlp4 dependencies

settling

minor changes: add a update_config function
moved from stringext to astring
moved from oasis to topkg

cleanups

from CHANGES:

• config contains policies and versions, but no longer the DSA key
• DSA key needs to be provided separately in new_session
• own_fingerprint takes a DSA key, not a config
• handle simultaneous open (both parties send a DH_COMMIT) gracefully

intial

initial public release of OCaml-OTR