Stdlib 1.0

[piotrMocz]

This epic aims to capture all the tasks necessary to provide our users with a usable standard library.

The goals here are:

• feature completeness: we want to support a sensible set of operations on numbers, text, lists and maps, including: checking for equality, converting to text, casting (e.g. 4.toReal) and so on.
• consistency: the users have a right to expect certain consistency throughout the library, like every two objects of the same time being comparable (.equals) or show-able (within reason).
• reliability: the core StdLib should be tested and fool-proof.