Migrate FP utilities from metarhia/common

[tshemsedinov]

Original implementation: https://github.com/metarhia/common/blob/master/lib/fp.js

We need to implement:

• unittests (node native test runner and asserts)
• documentation in README.md
• typings in .d.ts

[PakoAmadi]

Hello! I am ready to take this task. What about tasks: can I move test cases from tests/fp.js and add new in needed?

[tshemsedinov]

Yes, you can take tests from https://github.com/metarhia/common/blob/master/test/fp.js but convert into node asserts and native node.js test runner