added two crawler levels in votes to get record initiative
added initiatives relation on votings scraper
added votings relation to initiative API resource
fixed initiative saving in vote scraper
added beautifulsoup to requiriments for special aprser in scrapers
fixed migrate bug between groups and members
deleted blog app
added erros pages
deleted blog app from urls.py
Merge branch 'master' of https://github.com/openkratio/proyecto-colibri
deleted unusued modules from requiriments.txt