Remove duplicated point in polyline encoded data

First point was outputted twice.
Add test case.

features/step_definitions/routing.rb

@@ -77,6 +77,9 @@ When /^I route I should get$/ do |table|
         if table.headers.include? 'end'
           got['end'] = instructions ? json['route_summary']['end_point'] : nil
         end
+        if table.headers.include? 'geometry'
+            got['geometry'] = json['route_geometry']
+        end
         if table.headers.include? 'route'
           got['route'] = (instructions || '').strip
           if table.headers.include?('distance')

features/testbot/geometry.feature

@@ -0,0 +1,30 @@
+@routing
+Feature: Retrieve geometry
+
+    Background: Use some profile
+        Given the profile "testbot"
+
+
+    @geometry
+    Scenario: Route retrieving geometry
+       Given the node locations
+            | node | lat | lon |
+            | a    | 1.0 | 1.5 |
+            | b    | 2.0 | 2.5 |
+            | c    | 3.0 | 3.5 |
+            | d    | 4.0 | 4.5 |
+
+        And the ways
+            | nodes |
+            | ab    |
+            | bc    |
+            | cd    |
+
+        When I route I should get
+            | from | to | route | geometry                             |
+            | a    | c  | ab,bc | _c`\|@_upzA_c`\|@_c`\|@_c`\|@_c`\|@  |
+            | b    | d  | bc,cd | _gayB_yqwC_c`\|@_c`\|@_c`\|@_c`\|@   |
+
+# Mind the \ before the pipes
+# polycodec.rb decode2 '_c`|@_upzA_c`|@_c`|@_c`|@_c`|@' [[1.0, 1.5], [2.0, 2.5], [3.0, 3.5]]
+# polycodec.rb decode2 '_gayB_yqwC_c`|@_c`|@_c`|@_c`|@' [[2.0, 2.5], [3.0, 3.5], [4.0, 4.5]]