Improvement - Normalize utils

[korzio]

• Update utils with mirroring concept - now they are using fn() ? invalid: valid, should be vice versa
• Move utils to separate package?!

[korzio]

Same for validators, f.e.

tpl('if (')(schema.allOf.map(reference => tpl.resolve(reference))
    .join('(%s) || '), tpl.data)('(%s))', tpl.data)(tpl.error('allOf'));

could be rewritten with a es6 template (that is for investigation)

[korzio]

• add destructuring for template, it will make code cleaner

[korzio]

Moved to the next release, as I expect there will be some bugfixes related to utils as well, and also some work is already done - 6c99491