Added release notes for 1.0.1.
Added release notes for 1.0.1.

notxcain/shapeless,isaka/shapeless,triggerNZ/shapeless,alexarchambault/shapeless,joescii/shapeless,lambdista/shapeless,wheaties/shapeless,Atry/shapeless,fthomas/shapeless,milessabin/shapeless,liff/shapeless,clhodapp/shapeless,tek/shapeless,TomasMikula/shapeless,retronym/shapeless,malcolmgreaves/shapeless,lukasz-golebiewski/shapeless,roberth/shapeless,khronnuz/shapeless