add tags autocomplete

app/controllers/tags_controller.rb

@@ -0,0 +1,15 @@
+class TagsController < ApplicationController
+	def index
+	end
+
+	def autocomplete
+		tags = Project.tag_counts.limit 8
+		tags = tags.where('name like ?', "%#{params[:term]}%") unless params[:term].blank?
+		tags = tags.map {|t| t.name}
+
+		respond_to do |format|
+			format.json { render json: tags}
+		end
+	end
+
+end