JTAG Boundary scanner v2.50

- config.script configuration file support.

- FDTI probes settings can be now changed into
  the configuration file.

- Pins are now naturally ordered.

- New script commands :
    - "pause" : pause the execution during x milliseconds.
    - "include" : include and execute another script file. (WIP)
    - "system" : do a system call/operation. (WIP)

- Code fixes and improvements.