* Removed memcaching for TagImplication (too many latent race conditions)

* Added Post.exact_tag_match to skip normalization/metatag parsing
* Added DelayedJob support for tag alias/implication processing

app/controllers/tag_aliases_controller.rb

@@ -15,6 +15,7 @@ class TagAliasesController < ApplicationController
   
   def create
     @tag_alias = TagAlias.create(params[:tag_alias])
+    @tag_alias.delay.process!
     respond_with(@tag_alias, :location => tag_aliases_path(:search => {:id_eq => @tag_alias.id}))
   end
   

app/controllers/tag_implications_controller.rb

@@ -15,6 +15,7 @@ class TagImplicationsController < ApplicationController
   
   def create
     @tag_implication = TagImplication.create(params[:tag_implication])
+    @tag_implication.delay.process!
     respond_with(@tag_implication, :location => tag_implications_path(:search => {:id_eq => @tag_implication.id}))
   end