Revert "Revert "Merge pull request #119 from wiki-ai/db_connection""
Revert "Revert "Merge pull request #119 from wiki-ai/db_connection""

This reverts commit 9fe3fe826a49fa46e7289ba0d803aea47422e520.

wiki-ai/wikilabels,wiki-ai/wikilabels,wiki-ai/wikilabels