add chat3 example
remove container record hmac key column from db
remove container hmac key references from client
fix hanging reference to plural container key decryption in client
fix hanging references to container session key share hmac key in server
add new commit config to crypton conf
sign and verify all container records with signing keys
Merge pull request #167 from ecto/container_record_signatures

Improved container record signatures
make chat3 poll for messages
fix typo
Merge branch 'master' of github.com:SpiderOak/crypton into encrypt-sign-messages-inbox
Merge branch 'encrypt-sign-messages-inbox' of github.com:SpiderOak/crypton into encrypt-sign-messages-inbox
make encryptAndSign integration for messages backward compatible