fix timing problem in hit_generator/FE chip
change output road to 30 bits width
The bit width of the road results is changed to 30 bits and the the MSBs
show the status of the road 0x1xxxxxxx for a usual road 0x3xxxxxxx for
the last word representing the event time
change few todos
move sensor_module to sub directory
and change it to sensor_module_ss
move data organizer to modules directory
move hit_generator to modules sub-directory
move road_analyzer to modules sub-directory
move stub_fifo to modules sub-directory