Merge pull request grpc#2041 from murgatroid99/backport_node_0.9.2

Backport Node library JS changes to the release branch

Merge pull request grpc#1881 from jtattermusch/csharp_bump_version_in…

…_release

Integrate nuget and build changes from upstream

Merge pull request grpc#1866 from dgquintas/stack-allocate-bb-reader

Removed grpc_byte_buffer_reader_{create,destroy}.

Merge pull request grpc#1756 from grpc/jcanizales-update-objc-instruc…

…tions

Add simpler instructions for ObjC (using Homebrew)

Merge pull request grpc#1218 from tbetbetbe/grpc_ruby_release_0_6_0

Bump ruby version to match the new release

Merge pull request grpc#827 from a11r/d2

Minor fix to INSTALL