Implement LDB_IMM

Add demo instructions

Clear unused LEDs

Capitalize "IEEE" everywhere

Add missing mappings for input ports

Remove unnecessary TODO comments

Condense redundant port declarations

Add FPGA top level components

Clear demo memory contents

Initialize registers to 0

Implement BRA

Implement STA_DIR

Implement LDA_DIR

Fix variable case

Connect IR to data path

Fix variable case

Add data path ports

Add waveform file to gitignore

Implement LDA_IMM

Add CPU declaration to computer