Adds polylines gem. Adds polylines and polylines_as_points methods

Gemfile

@@ -1,3 +1,4 @@
 source :rubygems
 
 gem 'nokogiri'
+gem 'polylines'

Gemfile.lock

@@ -4,9 +4,14 @@ GEM
     mini_portile (0.5.0)
     nokogiri (1.6.0)
       mini_portile (~> 0.5.0)
+    polylines (0.3.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   nokogiri
+  polylines
+
+BUNDLED WITH
+   1.12.5

lib/google_directions.rb

@@ -3,6 +3,7 @@
 require 'net/http'
 require 'open-uri'
 require 'nokogiri'
+require 'polylines'
 
 class GoogleDirections
 
@@ -87,6 +88,14 @@ def steps
     end
   end
 
+  def polylines
+    @doc.css('polyline').map{|poly| poly.text.strip}
+  end
+
+  def polylines_as_points
+    polylines.map{|poly| Polylines::Decoder.decode_polyline(poly)}.flatten(1).uniq
+  end
+
   private
 
     def convert_to_minutes(text)