Lazy compilation (replacement to snapshots)

[playXE]

Snapshots are cool but they tend to consume some heap memory and require a fully initialized heap. When we will switch to Comet as our GC we should replace snapshots with lazy init.

Pros:

• Same fast startup time
• Less memory consumption. Memory is allocated on demand
• Simplify code base. Snapshots require a lot of maintenance and it is quite hard to debug them.

Cons:

• No way to create a fully initialized VM instance on the fly