Update views fields

There are some lost views fields from twitter_2.x that are helpful for easing the migration from 2.x to 3.x and for adding more information in views.
Lost fields were:
twitter_id (Status ID), helpful for creating links to status messages in twitter web
in_reply_to_status_id (Reply ID)
in_reply_to_screen_name (Reply Name)

There is a redundant screen_name field coming from the twitter table (tweets) and from the twitter account (twitter users) that should be best explained in order to avoid unnecesaries joins when mixing fields from different tables in the same view.