Boxing Elimination changes

[Lukas Stadler]

Hi everybody,

there will be a change soon that removes the BoxingEliminationPhase, because its work is now performed by the PartialEscapeAnalysisPhase.
This will have no bearing on most of you, since the old phase isn't part of the normal compilation.

In case you have custom code using the BoxingEliminationPhase, you should be fine just letting the PartialEscapeAnalysisPhase do its magic.
If there are any problems, please let me know.

- Lukas