Alphabetize functions.
Fix reflection warnings. Fix several bugs.

* Fix (focused) function. Didn't work before.
* Remove (specular gray alpha) and (specular x y z a) functions. They don't exist.
* Remove (text-width ch) function. Now (text-width) only accepts String as parameter. Version which accepts char is broken in 1.5.1, it was broken only very recently: https://github.com/processing/processing/issues/2331