Bumped Scala.js to 0.6.8.
Bumped Scala.js to 0.6.8.

liff/shapeless,wheaties/shapeless,lambdista/shapeless,triggerNZ/shapeless,isaka/shapeless,lukasz-golebiewski/shapeless,alexarchambault/shapeless,fthomas/shapeless,milessabin/shapeless,khronnuz/shapeless