Enhancements for faas-cli describe

Changelog for 0.14.4:

• PR #915 feat: Add missing fields to the describe output by @LucasRoesler

Commits
17baca4 fix: add section header for usage data in describe output by @LucasRoesler
f3f2ead fix: remove extra spaces from the describe output by @LucasRoesler
ece60be feat: create dynamic printer for the function describe output by @LucasRoesler
b65e279 feat: Add missing fields to the describe output by @LucasRoesler

Changes: 0.14.3...0.14.4

Generated by Derek