added -1 as default value for statuses and retwees in get_tweet_data
added local database connexion for local tests
Merge branch 'develop' into twitterETL
Añadida funcionalidad get-chains-tweets
Añadida funcionalidad get-chains-tweets
Añadida funcionalidad get-chains-tweets
Añadida funcionalidad get-chains-tweets
modified tweet pubdate. Now it eneters the date of creation obtained form the Twitter API  instead of the date of the day before the process was run.
Solucionados bugs de prints al fichero log.
Añadidos comprobaciones de cadenas vacias antes de encodes.
Preparando version para producción.
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	twitter/utils/twitter_etl.py
Solving merge problems
Solving merge problems
Merge branch 'develop'

Conflicts:
	twitter/utils/twitter_etl.py