Move all to package chisel.miscutils

src/main/scala/DataWidthConverter.scala

+package chisel.miscutils
 import Chisel._
 
 /**

src/main/scala/DecoupledDataSource.scala

+package chisel.miscutils
 import Chisel._
 
 /**

src/test/scala/DataWidthConverterSuite.scala

+package chisel.miscutils
 import Chisel._
 import org.scalatest.junit.JUnitSuite
 import org.junit.Test

src/test/scala/DecoupledDataSourceSuite.scala

+package chisel.miscutils
 import Chisel._
 import org.scalatest.junit.JUnitSuite
 import org.junit.Test