bumping to 0.2.1 for bandits improvements/bug fixes from @norases
updating changelog for v0.2.1 release
Added startup greeting to webserver
Updated changelog
Responded to reviews
Responded to reviews
Merge pull request #402 from Yelp/sclark_400_add_startup_greeting

Sclark 400 add startup greeting
making CudaDevicePointer a smart pointer (wrapping std::unique_ptr)
Merge branch 'master' of github.com:yelp/MOE into jialei_gh368_cuda_python_interface

Conflicts:
	CHANGELOG.md