- allows for no-package applets and applications (which is quite common
in the Java applet world).

- totally refactored, streamlined Java-to-JavaScript class name
conversion, including the "j2s/_" (single underscore) package, which
contains (originally) package-less applets and applications. All
Java2ScriptVisitor  "getFinal..." methods return JavaScript-ready names
that are intended for immediate appending to the output buffer. Prior to
that moment, all class names are maintained as their Java values.

- more efficient anonymous class creation (including lambda methods,
constructors, and expressions).

- full support for method-local named classes.

- full, efficient support for default interface methods.

- fully qualified methods [ excluding Math.* and *.toString() ], so no
conflict with any standard JavaScript objects.

- bullet-proof "final or effectively final" variables.

- strongly anonymous-function scoped for "private" methods.

- corrects several issues with java.util.function.* and
java.util.stream.*.

- adds ?j2sverbose option (former standard logging all class loading),
with the default being "quiet" mode, which gives no indication of file
loading. (Also settable as J2S._quiet = [true|false]

- adds hooks into Clazz object loading, allowing page intervention just
after Clazz itself has been loaded, but the core files have not been
loaded, and also just after core files have been loaded. This could be
useful for customization of the loading process -- for example,
dynamically settable core file configuration.

- adds System.getProperty("user.home"), which defaults to https://./
(which isn't a standard protocol, but is passed through the Java system
and interpreted in JavaScript as the document base).

- reorganizes java2script project files for better version control.

- adds {project}/resources/ and {project}/libjs as standard places for
non-Java resources and zip-equivalents of JAR files that are
automatically copied into the {project}/site directory.