[parenscript-devel] *enable-package-system* and backward compatibility in general

hi!

i've tried to update ucw to the new parenscript repo, but it turned out to be more headache then what i want to address right now.

i've seen that a new naming convention is used instead of some old api functions. is there a chance of leaving the old api and keeping it backward compatible? specifically js:js* and friends should bind *enable-package-system* to false somewhere, and things like that.

globally changing *enable-package-system* before loading ucw is a really bad idea, but ucw calls parenscript even at compile time, so rebinding *enable-package-system* by ucw when serving a request is also not working.

i've pushed some unimportant changes in the process, though.