Symbinode v0.3

Hi. Work on v0.3 is finally finished. There were many small problems and unexpected things. Luckily we solved them all although it took more time. 

Changes:

• Added Parallax rendering mode
• Added Emissive rendering mode
• Added Heights map
• Added Emission map
• Added Directional Warp node
• Added Directional Blur node
• Added Slope Blur node
• Added Gradient node
• Added Bevel node (runs entirely on GPU) 
• Added Polar transform node 
• Added Bricks pattern node
• Added Hex pattern node
• Added color to grayscale conversion node
• Added ability to bring nodes back to the center of the screen using the F hotkey. This also works in Material view and Node view.
• Added ability to do a mask without depth in the Tile node (this is needed for some cases when the depth breaks the pattern).

Improved Blur node, now blur is more stable and does not create small artifacts.

The parameter sliders have been improved. The area for incremental changes has been moved outside the slider. Value field no longer interferes with slider movement. The value field can be edited by double clicking on it.

Fixed bug with loading environment map (thanks to cgmodeler).

Thank you for your support of the project. Your attention is very important to us. It increases our motivation for further development. If you have any questions or you find a bug, please let us know in the comments or in the Issues on the Github.

We will continue to implement important nodes in the next update as part of the basic features (hopefully faster this time) .