v0.1.3

What's Changed

• Add fold util. Cosmetic code movement. by @jgarzik in #11
• add util: pwd by @jgarzik in #12
• add util: printf by @jgarzik in #13
• add util: expr by @jgarzik in #14
• add util: chmod by @jgarzik in #15
• add util: touch by @jgarzik in #16
• add code comments by @jgarzik in #17
• add util: mv by @jgarzik in #18
• Version 0.1.3 by @jgarzik in #19

Full Changelog: v0.1.2...v0.1.3