Add draft CHANGELOG for 1.3.0
Add draft CHANGELOG for 1.3.0

Ricardo666666/thrust,xiongzhanblake/thrust,zeryx/thrust,thrust/thrust,marksantos/thrust,xiongzhanblake/thrust,sarvex/thrust,arnabgho/thrust,zhenglaizhang/thrust,dachziegel/thrust,jaredhoberock/thrust,egaburov/thrust,thrust/thrust,thvasilo/thrust,raygit/thrust,thrust/thrust,arnabgho/thrust,sdalton1/thrust,thrust/thrust,andrewcorrigan/thrust-multi-permutation-iterator,zhenglaizhang/thrust,jaredhoberock/thrust,zeryx/thrust,xiongzhanblake/thrust_src,egaburov/thrust,marksantos/thrust,raygit/thrust,thvasilo/thrust,xiongzhanblake/thrust,jaredhoberock/thrust,Ricardo666666/thrust,sdalton1/thrust,GrimDerp/thrust,mohamed-ali/thrust,andrewcorrigan/thrust-multi-permutation-iterator,thvasilo/thrust,egaburov/thrust,raygit/thrust,mohamed-ali/thrust,zhenglaizhang/thrust,xiongzhanblake/thrust_src,Ricardo666666/thrust,sarvex/thrust,andrewcorrigan/thrust-multi-permutation-iterator,mohamed-ali/thrust,dachziegel/thrust,zeryx/thrust,GrimDerp/thrust,arnabgho/thrust,GrimDerp/thrust,sdalton1/thrust,sarvex/thrust,xiongzhanblake/thrust_src,jaredhoberock/thrust,jaredhoberock/thrust,marksantos/thrust,thrust/thrust,dachziegel/thrust