Made shaders a class to make it easier to add more in future.
Added shaders for updown and downup fades.
Fix loading characters with no pattern (e.g. black_mask) not working.
Gave ability to cancel lerps in case a character gets put on then immediately faded to another alpha.
Punch position uses the actual easing from utage now.
Fix audio context not being able to be created without user input in some new browsers.
Some changes for diva fades.
Made ui image match games slightly more.
Disabled select on text since you can't select it without triggering next anyways.
Various other minor fixes.
