Ignore single-line comments in assembly. See #4

[aw]

I'm not sure if anything needs to be added to this, but essentially it adds functionality (in assembly) to skip single-line comments.

[theandrew168]

Looks great! Tested this myself and all seems to be working as expected. I've got issue #2 open to come up with some way to test the interpreter. I figure that using something like expect could allow pytest to get in there and verify basic behavior. I'll probably look into that here soon.

Fixes #4