v0.12.0 Update

• The Sort component is now supported since the last official version change - essentially a Choices component where the player must drag and drop the options into a sorted order before submitting. Thanks to theoryofgame for adding this support!
• New Hackbox.Builders namespace with some convenience builder-style classes to much more quickly and reliably configure Presets, Components, and States in code. All lower-level code remains intact - this namespace just provides a more friendly higher-level interface to the system.
• Added very basic image-based background property mode in the Editor. Should be more friendly now to specify a image with a URL to use as the background for the State or Components.