Merge branch 'master' into repackagecore-testbed

# Conflicts:
#	chiselFrontend/src/main/scala/chisel3/Bits.scala
#	chiselFrontend/src/main/scala/chisel3/Data.scala
#	chiselFrontend/src/main/scala/chisel3/experimental/Annotation.scala
#	chiselFrontend/src/main/scala/chisel3/experimental/StrongEnum.scala
#	chiselFrontend/src/main/scala/chisel3/internal/Builder.scala
#	src/main/scala/chisel3/internal/firrtl/Converter.scala
#	src/main/scala/chisel3/package.scala
#	src/main/scala/chisel3/util/MixedVec.scala
#	src/test/scala/chiselTests/AnnotationNoDedup.scala
#	src/test/scala/chiselTests/Direction.scala
#	src/test/scala/chiselTests/StrongEnum.scala