0.2.3 - Fixes, Builds for Win/Mac/Linux

Fixes of some longstanding bugs, nothing new really:

• Brought back the menu bar, for easier true fullscreen on projector and general view options
• Added the github link
• Saves now persist custom ranges and steps in snumber inputs in nodes
• Fixed the counter node
• Output nodes now have a better "status" message for where they are projecting
• Unused mixer will inputs show as black disconnected and return to black when output closed.
• Fixed bug where midi learn box would be left stuck open