From alpha to beta stage

A couple of changes have been made to the client and the server code base lately:

• The client now checks at startup wheter the 'Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files' are installed - if not the program terminates presenting a corresponding message to the user.
• The client now checks if packets haven't been acknowledged within the last 5 minutes and if so puts them back into the 'Pending' state.
• At startup the client now resets all outgoing packets back to the 'Pending' state.
• The server code was adapted so that packets that haven't been relayed within the last 5 minutes get deleted.
• Finally a button has been added to the 'New message' tab so that users are now able to clear the attachment field in case an attachment has been sent before.
• A couple of additional exception catch blocks have further improved robustness and stability of the client code.

These modifications and improvements have finally led to a pretty stable version of the AleHu messaging system. A lot of testing has taken place sending gigabytes of traffic (mostly movies from the Internet Archive at https://archive.org/) and all those transmitted packets have safely arrived at their destination after being relayed by the AleHu server. As a consequence, the alpha stage was left and we have now entered the beta stage.