Crash on 'install' when input seq was empty - fixes 395
Bump version to 0.16.3
Merge branch 'bugfix'

Conflicts:
	RELEASE_NOTES.md
	src/Paket.Bootstrapper/Properties/AssemblyInfo.cs
	src/Paket.Core/AssemblyInfo.fs
	src/Paket.Core/InstallProcess.fs
	src/Paket/AssemblyInfo.fs