Add support for v0.11 GRPC services

This also refactors the client GRPC wrapper to dynamically load the
request objects.
All GRPC generated client files now live under lib/grpc_services

lib/grpc_services/lnclipb/lncli_pb.rb

@@ -0,0 +1,18 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: lnclipb/lncli.proto
+
+require 'google/protobuf'
+
+require 'verrpc/verrpc_pb'
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_file("lnclipb/lncli.proto", :syntax => :proto3) do
+    add_message "lnclipb.VersionResponse" do
+      optional :lncli, :message, 1, "verrpc.Version"
+      optional :lnd, :message, 2, "verrpc.Version"
+    end
+  end
+end
+
+module Lnclipb
+  VersionResponse = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("lnclipb.VersionResponse").msgclass
+end