cmake flag updates

[JodyLeSage]

With the newest version of cmake (3.5.1), you need to include the -felf64 flag for nasm, otherwise it defaults to the elf32 format, which is not compatible with 64bit assembly. I have also renamed some folders to make them easier to navigate via the command line.

[JodyLeSage]

Fixed typos, closed a few data leaks that allow the test taker to steal correct answers left in the registers, added solutions for labs 1-12, and clarified a couple vague questions