[RPC #6] add documentation for IntelliHome::IntelliHomeRPC
[RPC #6] add documentation for IntelliHome::Workers::Master::RPC
[RPC #6] add documentation for IntelliHome::RPC::Service::Base
[RPC #6] update documentation for IntelliHome::RPC::Service::Base
[RPC #6] add documentation for IntelliHome::RPC::Service::Command
[RPC #6] add documentation for IntelliHome::RPC::Service::Dummy
[RPC #6] add documentation for IntelliHome::RPC::Service::Parse