Fix blog error (incomplete)

* Authentication#weibo_data returns error code and it's not handled correctly
init testing
remove user_id from authentication
add test to access home page
fix refinery_user? method that from override
add masthead test
comment out blog test
remove itme tag from blog view
fix authenticion weibo methods and blog test
fix #25 Make thumbnails in image page display correctly
Merge branch 'refinerycms' into image-type
Scheme change
Merge pull request #29 from Shinetechchina/image-type

#25 Fix thumbnails display