Hygiene for tree manipulation

[scabug]

https://groups.google.com/forum/#!topic/scala-language/7h27npd1DKI

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Imported From: https://issues.scala-lang.org/browse/SI-7823?orig=1
Reporter: @xeno-by
Affected Versions: 2.10.0, 2.11.0
Blocks #8384

[SethTisue]

nothing this ambitious is going to happen to scala.reflect macros