Mobicents jSS7

This is a clone of Mobicents jSS7. It includes many bug fixes -- mainly in the MTP stack -- and a few new features.

The new features include:

• the -r option of the SS7 Simulator's GUI: allows to specify the RMI port used by the core part
• the -s option of the SS7 Simulator's Core: allows to start the simulation immediately without waiting for an explicity command from the user
• a second MAP Stack for the SS7 Simulator: this is required to properly simulate both the MSC and the HLR
• the -c option of the Shell Client (CLI): allows to specify one or more (if specified multiple times) commands to be executed immediately upon start-up
• a new build system base on GNU make: for instruction on its use read the build instructions -- note that the Maven base build system is still available and required to build the documentation and run the tests
• a second Nature of Address parameter in the simulator's SCCP configuration used to build additional routing rules
• add to UserDataImpl helper functions to split long messages

The bug fixes include:

• a persistence bug in Linkset management
• SLS bits allocation in M3UA AS routing policy
• frame queueing/verification in MTP2
• links and linksets activation/deactivation
• badly dimensioned DAHDI buffers
• HDLC broken write policy (it was "write and forget", now it is "write and retry again later, if the buffer is full")
• Shell CLI reactivity
• SLS to MTP2 links mapping algorithm
• SLTM/SLTA ping scheduling and TRA sending
• and many others (run git log for a detailed list)