Revert "Stop passing args to serial() and parallel()"

This reverts commit e3db9dec627f577bac0dd85e7c0a3d550b2804bb.

Conflicts:
	index.js
Remove obsolete ideas
Use null instead of undefined
Added initial function wrapping

Adds alternative syntax: modifying function instead of wrapping it into
one more combinator/decorator.

An experimental change aimed to reduce right shift.
Add clear idea