Improve JVM bytecode generation about virgil HOT 3 OPEN

Hello, I had a look at that conversation. Can you try running IKVM on Virgil's 
own test suite? There are thousands of small programs, so it should pinpoint 
exactly which pattern(s) of bytecode IKVM is complaining about.

E.g. 

1. Checkout Virgil
2. Add virgil/bin and virgil/bin/dev to your $PATH.
3. Make a symbolic link to IKVM as 'java' somewhere in your path, so that 
'which java' points to IKVM.

% aeneas bootstrap
% cd test/execute
% ./test.bash

You should see:

  Interpreting ()...ok
  Interpreting (-ra)...ok
  Compiling    (jvm)...ok
  Running      (jvm)...

[errors here]

OK I'll set up a linux VM and post the results later