Added comment note
Started adding vector stacks for integers, floats, booleans, and strings.
Added more vector instructions
Added more vector instructions
Changed default for :replace-child-that-exceeds-size-limit-with to :random
Finished adding vector instructions
Added vector instructions to instruction-types
Made vector literals recognized.
Added comment to string_differences
Added and example of only using some stacks to the tutorial.
Merge branch 'instruction-additions' into prog-synth-benchmarks

Conflicts:
	src/clojush/globals.clj