0.3.4

[klevron]

• how to make VideoTexture? trois#82
• Retina / HDPI screens trois#88
• Question: ExtrudeGeometry in Troisjs trois#112
• refs not working on custom component trois#113
• Render Loop does not work with GltfModel trois#115
• Question: exposing constructor parameters (e.g. preserveDrawingBuffer) trois#117