Merge pull request #30 from ciudadanointeligente/dev

Dev
Merge pull request #32 from ciudadanointeligente/dev

[hotfix] migration fixing
Merge pull request #33 from ciudadanointeligente/dev

Dev
Merge pull request #35 from ciudadanointeligente/mail_plugin

Mail plugin
Testing with travis
Fixing settings to load database from settings.py
Adding build status to README.md
coveralls configuration in travis.yml
Adding configuration for running coveralls
Adding coverage badge for README