Clear up :)

M-M-MAXIMUM REFACTORING!
And again
Now I don't need optimist library! :)
Optimized
Let's go
It is awful, but I am going to rewrite it later
These are old stuff
I am continuing awful actions against the nature
Big tests file
Continue splitting
Clear up
And again
More splitting
Splitting finished
Clear up
Another commit
Strict mode has been removed
Update "with" parsing