Prefer using zeus spec over zeus rake spec

Zeus appears to keep rake in the development environment, unlike zeus
spec which runs in the test environment.
Merge pull request #78 from dgtized/prefer-zeus-spec

Prefer using zeus spec over zeus rake spec
Remove outdated test file
Remove ignore lines that should be in user .gitignores
Ignore build artifacts
Use syntax highlighting of GFM
There are no expectations
Require cl-lib
Remove deprecated cl
Add cl-lib as a dependency
Correct indentation
Merge pull request #79 from CQQL/toggle-buffer

Assorted tweaks and cleanups