Add .gitignore file -- this is probably overkill
Add copyright, authorship, and license information
Get some basic definitions and module structure going. Not sure whether Cargo.lock should be in .gitignore
Shuffle things around a little. For now a library called machine6502 will be the main code base. 6502-rs is inconvenient to use in a rust context since it starts with a number. The test_exe is no longer the main cargo build target
Add just a bit of extra annotation to the Instruction chart
Add add_with_carry().
move notes into notes folder
a bit more commenting for the Instruction enum, and Addr vs AddrDiff distinction
Merge pull request #3 from typelist/master

stuff that doesn't do anything
Merge branch 'master' into from-scratch