added support for rails4

lib/sendhub.rb

@@ -20,5 +20,7 @@ module Sendhub
     require 'sendhub/plugins/rails2'
   elsif Rails.version =~ /^3./
     require 'sendhub/plugins/rails3'
+  elsif Rails.version =~ /^4./
+    require 'sendhub/plugins/rails3'
   end
 end

sendhub.gemspec

@@ -2,11 +2,11 @@
 
 Gem::Specification.new do |s|
   s.name = %q{sendhub}
-  s.version = "0.1.17"
+  s.version = "0.1.18"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Richard Taylor"]
-  s.date = %q{2012-07-11}
+  s.date = %q{2013-01-14}
   s.description = %q{sendhub is a Ruby client library for SendHub.net.}
   s.email = %q{[email protected]}
   s.files = ["LICENSE", "README.textile","lib/sendhub.rb","lib/sendhub/ca.pem"] + Dir.glob('lib/sendhub/*.rb') + Dir.glob('lib/sendhub/plugins/*.rb')
@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   if s.respond_to? :specification_version then
       current_version = Gem::Specification::CURRENT_SPECIFICATION_VERSION
       s.specification_version = 2
-  
+
       if Gem::Version.new(Gem::RubyGemsVersion) >= Gem::Version.new('1.2.0') then
         s.add_runtime_dependency(%q<json>, [">= 1.1.9"])
       else