Add search API and update frontend

The frontend has been updated to use the new search API.

lib/gollum/frontend/app.rb

@@ -130,8 +130,8 @@ module Precious
 
     get '/search' do
       @query = params[:q]
-      @search_command = "cd #{$path} && git grep -c '#{@query}' master"
-      @results = `#{@search_command}`
+      wiki = Gollum::Wiki.new($path)
+      @results = wiki.search @query
       mustache :search
     end
 

lib/gollum/frontend/views/search.rb

@@ -1,26 +1,12 @@
 module Precious
   module Views
     class Search < Layout
-      attr_reader :content, :page, :footer, :query
+      attr_reader :content, :page, :footer, :results, :query
 
       def has_results
-        !results.empty?
+        !@results.empty?
       end
 
-      def results
-        ret = []
-        @results.each_line do |line|
-          result = line.split(":")
-          file = result[1]
-          count = result[2].to_i
-          name = file.split(".")[0]
-          ret << {
-            :name => name,
-            :count => count
-          }
-        end
-        ret
-      end
     end
   end
 end