Fixes #53 - allow null and undefined args to be unrolled#58

lawrencec wants to merge 2 commits intomasterlawrencec/Unroll:masterfrom

53-allow-unrolled-args-to-have-a-value-of-null-or-undefinedlawrencec/Unroll:53-allow-unrolled-args-to-have-a-value-of-null-or-undefinedCopy head branch name to clipboard