#8 float type not documented

[Slaven Rezic]

The float type is not documented. The scientific notation e.g. "1e4" is not supported, though ruby itself seems to support this notation.

Furthermore, integer values like the value "1" seems to be not a valid float, which I found counterintuitive (as ints are normally part of floats). Therefore I think this type is not very useful, and number should be used instead.

Regards,
Slaven