A little bit "industrialised" but, eh...

[philippegabert]

Creating most of the default function from the strings package ( https://golang.org/pkg/strings )

What kind of change does this PR introduce? (check one with "x")

[] Bugfix
[X] Feature
[] Code style update (formatting, local variables)
[] Refactoring (no functional changes, no api changes)
[] Other... Please describe:

Fixes: #

What is the current behavior?

What is the new behavior?

[philippegabert]

Any update? @mellistibco