Create operation modules

[LovetheFrogs]

Create modules for:

• Full-adder (mode to choose between full adder and basic one)
• Substraction (sub)
• ALU
• Shift registers
• Sign extend registers
• Pure binary - two's complement - pure binary converter

Under the Operators module

[LovetheFrogs]

implemented adders

[LovetheFrogs]

Add also a pure to two's complement module

[LovetheFrogs]

implemented subtractors

[LovetheFrogs]

implemented alu

[LovetheFrogs]

implemented sign extension and shifter modules