Add CMP Immediate support
Comment out extraneous code in movImmediate()

MOV immediate can only move values 0 - 255 into a register so the code
to set the N flag in the APSR can never be executed.  Commenting out
this line improves the code coverage.
Add ADD 8-bit Immediate support.
Add simple line counting script

This BASH script just iterates through the C/C++ source files to count
the total lines (even comments and blank lines.)
Add SUB 8-bit Immediate support