Allow "implicit" keyword to be used with "import"

[ryanstull]

Here’s a link to a related thread:

Add ability to declare pattern matched values as implicit

A related thing that would be nice is if you could import non-implicit definitions as implicit. For example, if you wanted Numeric.BigDecimalAsIfIntegral in scope as an implicit, you would normally need to do: def foo[A: Integral](a: A) = ??? import scala.math.Numeric.BigDecimalAsIfIntegral implicit val integral = BigDecimalAsIfIntegral foo(BigDecimal(0.0)) but instead you could do: def foo[A: Integral](a: A) = ??? import implicit scala.math.Numeric.BigDecimalAsIfIntegral foo(BigDecimal(…