Symbinode v0.2

Hello, we were a little delayed after the new year, but we still finished everything that was planned for v0.2 
Let's move on to the changes.

Changes:

• Improved Undo / Redo: the effect now extends to instrument parameters.
• Changed the principle of alpha channel accounting: added ability to turn alpha channel on and off for individual nodes.



• Optimized data transfer to Node view window, which in turn speeded up the response.
• Basic implementation of frame for better graph organization.  If you want to exclude nodes from frame, use Alt + F.



• Possibility to export the result of any node in Node view window. Rmb in Node view window.
• Added possibility to change seed in noises and generators.
• Ability to cut connection. To do this, just press Ctrl + Lmb and draw the cut line.



• Fixed flickering of small details in the Material view window

I think it is important to mention that we - it's two people, one of which is responsible for design and overall direction of development and the second is the programmer. We are trying very hard to implement everything as fast as possible, but keep in mind the fact that all the work on the code does one girl. We hope for understanding.

If you find a bug and have some time, we would appreciate a bug report in the comments.