Fix nrc_next recipe to work with changed login

Changed from jsbrowser to mechanize, as it is simpler in use (or maybe
just better documented) and no JavaScript was needed.

recipes/nrc_next.recipe

@@ -1,9 +1,10 @@
 #!/usr/bin/env  python2
 # -*- coding: utf-8 -*-
-# Based on veezh's original recipe, Kovid Goyal's New York Times recipe and Snaabs nrc Handelsblad recipe
+# Based on veezh's original recipe, Kovid Goyal's New York Times
+# recipe and Snaabs nrc Handelsblad recipe
 
 __license__   = 'GPL v3'
-__copyright__ = '2014, Niels Giesen'
+__copyright__ = '2014 Niels Giesen'
 
 '''
 www.nrc.nl
@@ -30,25 +31,26 @@ class NRCNext(BasicNewsRecipe):
     }
 
     def build_index(self):
-        from calibre.web.jsbrowser.browser import Browser, ElementNotFound
-        br = Browser()
-        br.visit('http://login.nrc.nl/login', timeout=60)
-        f = br.select_form('#command')
-        f['username'] = self.username
-        f['password'] = self.password
-        br.submit()
-        raw = br.html
-        if '>log out<' not in raw:
+        import mechanize
+        br = mechanize.Browser()
+        br.open('https://login.nrc.nl/login', timeout=60)
+        br.select_form(nr=0)
+        br['username'] = self.username
+        br['password'] = self.password
+        response2 = br.submit()
+        raw = response2.get_data()
+        if 'ingelogd' not in raw: # in body class
             raise ValueError('Failed to login, check username and password')
         epubraw = None
         for today in (date.today(), date.today() - timedelta(days=1),):
-            url = 'http://digitaleeditie.nrc.nl/digitaleeditie/NN/%s/%d/%s___/downloads.html' % (today.strftime('%Y'), today.month - 1, today.strftime('%Y%m%d'))
+            url = 'http://digitaleeditie.nrc.nl/digitaleeditie/helekrant/epub/nn_%s.epub' \
+                  % today.strftime('%Y%m%d')
             self.log('Trying to download epub from:', url)
-            br.start_load(url, timeout=60)
             try:
-                epubraw = br.download_file('#CompleteDownloads .download-list .download-button')
+                response3 = br.open(url, timeout=60)
+                epubraw = response3.get_data()
                 break
-            except ElementNotFound:
+            except mechanize.HTTPError:
                 self.log('%r not available yet' % url)
                 continue