Lowering number of actions in invoker by half

Reference cons__V as string

External classes are treated as exported.

Make sure Object is always available in each VM and each extension.

All classes loaded through the 'vm' object will have 'invoke' method that can be used to invoke static methods like main(String[]), so our examples no longer need to rely on initialization in static initializers.

Load scripts asynchronously

There can be multiple VMs in one browser and the primitive types may be shared. Using string comparition to compare primitive classes.

Make sure test classes remain exported

Turning on standalone mode for the bck2brwsr.js

The static calculator demo needs to reference just a single application .js file from its main HTML page. The rest is loaded based on classpath attribute.