Debugger

After some tryouts it ended up being an Opal application. That is ruby as javascript in the browser.

On the left are the classes of the system. Next idea is to have hover info about them.
Next a source code view (not implemented)
next a view of the Virtual Instructions
last section, current block with current Register Instruction highlighted
step (next) button for single stepping
status: starting , running , exited
bottom row are the registers. If the register hold an object the variables are shown. (also should have hover info) , the first letter indicates the class, the number is the address

So lots to do, but a good start.

I don't want to use gdb anymore, and it would be easier without using the qemu setup, so:

single step debugging of the register machine level (as close to arm as need be)
visual transitions for steps
visualisation of data in registers (some kind of link to the object)
show the current instruction and a few around
show vm object (message etc)
show effect of register transitions on vm objects
visualize vm object content (again some links)

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