SI-8262 Fix compilation with 2.11 due to shadowing of Range

We now have `global.Range`, so our wildcard import of `global._`
shadows `scala.Range`.

This commit fully qualifies that type so as to be compatible with
Scala 2.10 and 2.11.
SI-8263 Avoid SOE in Symbol#logicallyEnclosingMember under Scala 2.11

Since the fix for SI-2066, Scala 2.11 calls logicallyEnclosingMember on the
`x` in the expansion of the task macro:

    InitializeInstance.app[[T0[x]](T0[java.io.File], T0[java.io.File]), Seq[java.io.File]]

This exposed the fact that SBT has created this symbol with NoSymbol as
the owner, and ran into a SOE.

I will also change the compiler to be more tolerant of this, but we can observe
good discipline in the macro and pick a sensible owner.