Add db:drop command
Merge pull request #21 from ryanlntn/feature/db-drop

Add db:drop command
Fixed db error issue
Version 0.6.1
Version 0.6.2 - remote and local differentiation and backups.
Version 0.6.3
Version 0.6.4 - bugfixes
Version 0.6.5 - updating update command.
Version 0.6.6 - update update