[Truffle] Implement BEGIN, JRuby parser already does all the work for us!
Add utility to find the first child of an AST node.
[Truffle] All lambda specs passing.
[Truffle] Remove truffelize for now - it's likely to be confusing.
[Truffle] Remove old benchmarks - see bench9000 instead.
[Truffle] Update build tools.
[Truffle] Correct name of produced Graal bundle.
[Truffle] Sort of make the dup and clone nodes suitable for compilation.
Fixed up old profiling code

* Turned off inlining for now so we can play with profiling
  independently.
Get -v into regression specs to find hangs.
More attempts to make this pass. Nondeterminism sucks.