optimize try-catch blocks

[kevinbarabash]

For processing-js we can wrap all callback functions in function that calls the original inside a try-catch. Apparently calling a single function that does a lot of stuff inside a try-catch is better that simply doing a lot of stuff inside a try catch.

More generally, functions being passed as callbacks could be wrapped using an IIFE.

[kevinbarabash]

Only add try-catches to functions we know are asynchronous, e.g. setTimeout, setInterval, requestAnimationFrame, and all of the processing function event handlers and draw.

[kevinbarabash]

Implemented for processing event handlers and draw in https://github.com/kevinbarabash/live-proxy/commit/6ebfe8d0d22b0bc8444081001732d59131d1aa5f.

[kevinbarabash]

handleUpdate has also been optimized.