Run instructions

• build project with Gradle
• run main class: simulator.CpuSimulator with 1 argument: instruction filename
• example: simulator.CpuSimulator instructions.txt
• add instruction files you want to run to 'input' directory
• you can reference just the filename when running project, and it will look for file in 'input' directory
• output of cache values (numbers greater than 0), register A and B values output in log form

Assumptions

• input format will always be "INSTRUCTION VALUE,VALUE"
• for any invalid instructions (doesn't match the list of instructions to support), they will be ignored
• when there is overflow, modulo of the value by 256 is taken

Improvements/questions for future iteration

• input file validation and handling (is it the correct format, is the instruction supported?)
• should we reject an instruction file if invalid instructions or skip over them?
• support arbitrarily more for-use registers (ex. C, D, E, etc)