Renamed the transfer package into network and moved HttpConnector from inchat-client to here.
Changed the content member of this class in order to be more dynamic with fields. Now, the CryptoPacker class can easily append all content fields of a message to a singe content file of the finally transported bytes.
Adapted to changes of Message. Now, the CryptoPacker fully dynamically usable. It reads all possible fields of the byte content part into a map of the plaintext when unpacking a message.
Added a dependency since HttpConnector moved from inchat-client to inchat-common.