Added dependencies for rinda

lib/rinda/rinda.gemspec

@@ -21,4 +21,8 @@ Gem::Specification.new do |spec|
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
+
+  spec.add_dependency "drb"
+  spec.add_dependency "ipaddr"
+  spec.add_dependency "forwardable"
 end