Upgrades the OTR protocol version from 2 to 3 with introducing instance tags
Adds a THANKS file.
Adds comments.
Added methods for getting the current outgoing session
Adds support for OTRv3 SMP Authentication
Changes signature of the OtrEngineHost.finishedSessionMessage callback method in order to pass the failed message text to the host application
add support for incoming fragmented messages

this is required for all OTRv2 and OTRv3 clients by the specification
and is required for example to talk to users behind IRC gateways
add proper exception handling for fragments
Merge pull request #12 from tribut/fragmentation

Implements OTR message fragmentation.
Merge branch 'otrV3' of github.com:jitsi/otr4j into otrV3
Up THANKS file.
Merge branch 'otrV3'