Added some Boolean logic nodes for those who need them.

Added the Matrix Split node which now let you split a matrix type in either Row Major or Column Major order.

The output vector will be determined by whether the input is Float2x2, Float3x3, or Float4x4.
For example When in Row Major mode if the input is Float2x2 Output M0 will output A float2 for the first row
and M1 will output another float2 for the second row. While M2 & M3 will output float4 with all zero's.

Added a Gradient Value Editor for the Gradient node. So that you can immediately see what the gradient looks like without having to click on the node.

Clicking on the gradient area also opens up a gradient editor popup just like its handled for the color value editor of the color constant and color parameter node.