adding first revision of javascript messaging/event library for Turtl. exposes classes for global event handling/triggering and also for doing javascript -> lisp -> javascript request/response cycles.
adding basic tests for TurtlEvent.js: both ping/pong type event bindings, as well as ping/pong request->response. both working great...
fixing prepare script to exclude README in systems/
re-enabling atexit turtl_shutdown trap for main.c
removing logging
starting ECL with more of a blank slate in ASDF build Makefile since we REALLY dont want it pulling in deps from outside.
supporting responses to javascript events (vs just blasting out events and hoping they land in the right spot). note that cl -> js -> cl request/responses arent supported because i cant think of a reason to even do this.