Bug fix area node

This makes the formatting of the output consistent with Range and
Series and it then works with VectorInNode for example. Also not so
sure about numerical precision, is there any reason to round that much,
or at all?
Extended math node and Vector Math node

Can handle 0,1,2 input.
Provides access to pi, e. A series of math function.

Vector math node reconfigures itself based on with different output and
input sockets.