Add IMDB rentals list to charts

This should add the IMDB rentals list to the charts and imdb automation.
This is actually a nice list as you can download the movies right away
instead of waiting until they release like with the rest of the imdb
charts.

The problem is that this does not work. And frankly I gave up. When I
type this in my python command window it works:

'''
from bs4 import BeautifulSoup
import urllib2

data = urllib2.urlopen('http://www.imdb.com/boxoffice/rentals')
html = BeautifulSoup(data)
result_div = html.find('div', attrs = {'id': 'main'})
'''

Then result_div contains the list of movies. In the code from this PR
result_div becomes None....?!?!?! @Ruudburger please help before I jump
off my building ;)

couchpotato/core/media/movie/providers/automation/imdb.py

@@ -104,16 +104,19 @@ class IMDBAutomation(IMDBBase):
         'theater': 'http://www.imdb.com/movies-in-theaters/',
         'top250': 'http://www.imdb.com/chart/top',
         'boxoffice': 'http://www.imdb.com/chart/',
+        'rentals': 'http://www.imdb.com/boxoffice/rentals',
     }
     chart_names = {
         'theater': 'IMDB - Movies in Theaters',
         'top250': 'IMDB - Top 250 Movies',
         'boxoffice': 'IMDB - Box Office',
+        'rentals': 'IMDB - Top DVD rentals',
     }
     chart_order = {
         'theater': 2,
-        'top250': 4,
+        'top250': 5,
         'boxoffice': 3,
+        'rentals': 4,
     }
 
     first_table = ['boxoffice']
@@ -240,6 +243,13 @@ config = [{
                     'description': 'New Movies <a href="http://www.imdb.com/movies-in-theaters/">In-Theaters</a> chart',
                     'default': True,
                 },
+                {
+                    'name': 'automation_charts_rentals',
+                    'type': 'bool',
+                    'label': 'DVD Rentals',
+                    'description': 'Top DVD <a href="http://www.imdb.com/boxoffice/rentals/">rentals</a> chart',
+                    'default': True,
+                },
                 {
                     'name': 'automation_charts_top250',
                     'type': 'bool',
@@ -282,6 +292,13 @@ config = [{
                     'description': 'IMDB <a href="http://www.imdb.com/chart/top/">TOP 250</a> chart',
                     'default': False,
                 },
+                {
+                    'name': 'chart_display_rentals',
+                    'type': 'bool',
+                    'label': 'DVD Rentals',
+                    'description': 'Top DVD <a href="http://www.imdb.com/boxoffice/rentals/">rentals</a> chart',
+                    'default': True,
+                },
                 {
                     'name': 'chart_display_boxoffice',
                     'type': 'bool',