finished post unit tests; added pool/tag alias/tag implication stub code

app/models/pool.rb

@@ -2,7 +2,7 @@ class Pool < ActiveRecord::Base
   validates_uniqueness_of :name
   validates_presence_of :name
   validates_format_of :name, :with => /\A[^\s;,]+\Z/, :on => :create, :message => "cannot have whitespace, commas, or semicolons"
-  belongs_to :creator, :class_name => "Person"
+  belongs_to :creator, :class_name => "User"
   
   def self.create_anonymous(creator)
     pool = Pool.create(:name => "TEMP - #{Time.now.to_f}.#{rand(1_000_000)}", :creator => creator)
@@ -14,7 +14,7 @@ class Pool < ActiveRecord::Base
     post_ids =~ /\A#{post.id} (\d+)|(\d+) #{post.id} (\d+)|(\d+) #{post.id}\Z/
     
     if $2 && $3
-      {:previous => $2.to_i, :next = $3.to_i}
+      {:previous => $2.to_i, :next => $3.to_i}
     elsif $1
       {:previous => $1.to_i}
     elsif $4