use atoms for property loads as well, and add a few more of them to the list (should autogenerate it from ejs-atoms.h)
turn conservative mode back on. Switch from __ejs being a bool to being an object, and move the GC object to a property on __ejs.
add a stack root for entry_name
move the string stuff from ejs-value.h to ejs-string.h (and from ejs-object.c to ejs-string.c)