Add note in gemspec that this is collectiveidea's fork

Rakefile

@@ -11,7 +11,7 @@ Jeweler::Tasks.new do |s|
   s.summary  = "Database-backed asynchronous priority queue system -- Extracted from Shopify"
   s.email    = "tobi@leetsoft.com"
   s.homepage = "http://github.com/collectiveidea/delayed_job"
-  s.description = "Delayed_job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks."
+  s.description = "Delayed_job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks.\n\nThis gem is collectiveidea's fork (http://github.com/collectiveidea/delayed_job)."
   s.authors  = ["Brandon Keepers", "Tobias Lütke"]
 
   s.has_rdoc = true

delayed_job.gemspec

@@ -10,7 +10,9 @@ Gem::Specification.new do |s|
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Brandon Keepers", "Tobias L\303\274tke"]
   s.date = %q{2010-03-26}
-  s.description = %q{Delayed_job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks.}
+  s.description = %q{Delayed_job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks.
+
+This gem is collectiveidea's fork (http://github.com/collectiveidea/delayed_job).}
   s.email = %q{tobi@leetsoft.com}
   s.extra_rdoc_files = [
     "README.textile"