0.26.0

A collection of minor fixes and changes that, as a whole, add up to something requiring a minor release. The most significant addition is a fix for situations where a Layout can raise an error when a component whose state has been delete is rendered. This occurs when element has been unmounted, but a latent event tells the layout it should be updated. For example, when a user clicks a button rapidly, and the resulting update deletes the original button.

• only one attr dict in vdom constructor - 555086a
• remove Option setter/getter with current property - 2627f79
• add cli command to show options - c9e6869
• check component has model state before render - 6a50d56
• rename daemon to run_in_thread + misc - 417b687