FEAT: added new mezz definitions: dot, any-series?, replace.
FEAT: red/integer/box internal function now returns the newly boxed value.
FEAT: preliminary release of the Red/Java bridge.

This is a work in progress, see %hello.red for a usage example. The Red part of the bridge still needs some improvements, notably:

- Lazily retrieve methods instead of all at once (memory saving concerns).
- Split the big enum-methods function.
- Wrap the Red/System parts in a context.
- Free JNI UTF strings created during instantiation and invocation.
- Extend method's arguments type checking to Java objects.
- Auto-fetch class fields.