Data processing components out of the box

[emil14]

Both Go and JavaScript lack support for collection processing functions. JS supports very basic stuff like map/filter/reduce. Python is a better example with its itertools package

I would like Neva to be a "batteries-included" language in this regard. Good examples of what I'm talking about are:

• lodash (js)
• lo (go)
• itertools (python)

Related to #642