Multiply nodes should be set to 1 by default

At the moment the Multiply float node has default values of 0.5 while the Multiply vector has 0.000, but I think it makes much more sense to have 1 as default just as the Scale vector does since that's the number one usually want's to start (ie when it doesn't do anything) with when multiplying stuff instead of the current arbitrary 0.5.

I guess this applies to divide as well, while the add and subtract makes more sense to default to 0, but those I don't have an as strong feeling about since it's mostly multiply that bothers me, but for consistency sake those should have a better default as well imo.