feat(views) - show filtered items for a view, SD-550

In order the get the filtered views:
`http://localhost:5000/content_view/53e49d3a8e4eba390dc6981b/?embedded={"items":1}`

Response:
``` javascript
{  
   "_id":"53e4de068e4eba0db5f586af",
   "_updated":"2014-08-08T14:26:14+0000",
   "_created":"2014-08-08T14:26:14+0000",
   "items":{  
      "_id":"53e4de068e4eba0db5f586ae",
      "filter":{  
         "and":[  
            {  
               "terms":{  
                  "type":[  
                     "text",
                     "picture"
                  ]
               }
            }
         ]
      },
      "location":"archive",
      "view_items":[  
         {  
            "_updated":"2014-08-08T14:26:14+0000",
            "_id":"53e4de068e4eba0db5f586a9",
            "_created":"2014-08-08T14:26:14+0000",
            "versioncreated":"2014-08-08T14:26:14+0000",
            "media":{  
               "name":"add8c035ad2bf0dfc9b3ac977d4a9a0358f51bc4b4dde1dac542dcc52f901a1e",
               "content_type":"image/jpeg",
               "length":469900
            },
            "_latest_version":1,
            "firstcreated":"2014-08-08T14:26:14+0000",
            "_links":{  
               "self":{  
                  "href":"/content_view/53e4de068e4eba0db5f586a9",
                  "title":"Archive"
               }
            },
            "guid":"tag:localhost:2014:c614841b-120f-4307-bf93-393595063bc2",
            "creator":"53e4de038e4eba0db5f58688",
            "renditions":{  
               "original":{  
                  "href":"http://localhost:5000/upload/53e4de068e4eba0db5f5869e/raw?_schema=http",
                  "mimetype":"image/jpeg",
                  "height":1600,
                  "width":1200,
                  "media":"53e4de068e4eba0db5f5869e"
               },
               "baseImage":{  
                  "href":"http://localhost:5000/upload/53e4de068e4eba0db5f586a1/raw?_schema=http",
                  "mimetype":"image/jpeg",
                  "height":1400,
                  "width":1050,
                  "media":"53e4de068e4eba0db5f586a1"
               },
               "thumbnail":{  
                  "href":"http://localhost:5000/upload/53e4de068e4eba0db5f586a4/raw?_schema=http",
                  "mimetype":"image/jpeg",
                  "height":120,
                  "width":90,
                  "media":"53e4de068e4eba0db5f586a4"
               },
               "viewImage":{  
                  "href":"http://localhost:5000/upload/53e4de068e4eba0db5f586a6/raw?_schema=http",
                  "mimetype":"image/jpeg",
                  "height":640,
                  "width":480,
                  "media":"53e4de068e4eba0db5f586a6"
               }
            },
            "version":1,
            "type":"picture",
            "mimetype":"image/jpeg",
            "user":"53e4de038e4eba0db5f58688",
            "filemeta":{  
               "datetimeoriginal":"2013:08:01 16:19:28",
               "flash":0,
               "exifimageheight":3264,
               "xresolution":[  
                  72,
                  1
               ],
               "orientation":1,
               "whitebalance":0,
               "model":"GT-I9300",
               "flashpixversion":"0100",
               "focallength":[  
                  37,
                  10
               ],
               "resolutionunit":2,
               "exposuretime":[  
                  1,
                  2004
               ],
               "scenecapturetype":0,
               "meteringmode":2,
               "imageuniqueid":"f3533c05daef2debe6257fd99e058eec",
               "colorspace":1,
               "datetimedigitized":"2013:08:01 16:19:28",
               "exifoffset":216,
               "componentsconfiguration":"0000",
               "datetime":"2013:08:01 16:19:28",
               "software":"Google",
               "exifversion":"0220",
               "yresolution":[  
                  72,
                  1
               ],
               "exposureprogram":3,
               "ycbcrpositioning":1,
               "length":469900,
               "exposuremode":0,
               "make":"SAMSUNG",
               "exifimagewidth":2448,
               "aperturevalue":[  
                  276,
                  100
               ],
               "fnumber":[  
                  26,
                  10
               ],
               "maxaperturevalue":[  
                  276,
                  100
               ],
               "imagewidth":3264,
               "imagelength":2448,
               "isospeedratings":80
            },
            "_version":1
         },
         {  
            "_updated":"2014-08-08T14:26:14+0000",
            "_id":"urn:newsml:localhost:2014-08-08T17:26:14.568296:10bd2893-d991-4978-bdc4-06b7660b9948",
            "_created":"2014-08-08T14:26:14+0000",
            "_version":1,
            "_latest_version":1,
            "firstcreated":"2014-08-08T14:26:14+0000",
            "_links":{  
               "self":{  
                  "href":"/content_view/urn:newsml:localhost:2014-08-08T17:26:14.568296:10bd2893-d991-4978-bdc4-06b7660b9948",
                  "title":"Archive"
               }
            },
            "guid":"urn:newsml:localhost:2014-08-08T17:26:14.568296:10bd2893-d991-4978-bdc4-06b7660b9948",
            "type":"text",
            "original_creator":"53e4de038e4eba0db5f58688",
            "user":"53e4de038e4eba0db5f58688",
            "versioncreated":"2014-08-08T14:26:14+0000"
         }
      ]
   },
   "name":"show my content",
   "filter":{  
      "and":[  
         {  
            "terms":{  
               "type":[  
                  "text",
                  "picture"
               ]
            }
         }
      ]
   },
   "user":"53e4de038e4eba0db5f58688",
   "description":"Show content items created by the current logged user",
   "location":"archive",
   "_links":{  
      "collection":{  
         "href":"/content_view",
         "title":"content_view"
      },
      "parent":{  
         "href":"/",
         "title":"home"
      },
      "self":{  
         "href":"/content_view/53e4de068e4eba0db5f586af",
         "title":"Content_view"
      }
   }
}
```

One bug easy to spot is that the self.href for embedded items are wrong, this seems to be an Eve bug, will open  an issue on upstream Eve against this if I don't have the time for a PR, the frontend can do a workaround if needed to call `/location/[embedded_id]`
On every content_view update a new content_view_items is created. 
Also content_view_items are never deleted.