Facing compatibility issues with examples Adder and Adder4, reverting those two to original Chisel3 code until further notice

To correctly run LFSR16 solution, removed line importing . Adapting Adder and Adder4 examples; Adder and VecshiftRegisterSimple problems and solutions

Correcting the chown issue in script and adapting ByteSelector and SimpleALU examplse and LFSR16 problem