Implemented reset task to delete all data

reset clears the data directory and resets the database to
database/baseline.sql
Implemented reset task to delete all data

reset clears the data directory and resets the database to
database/baseline.sql
Fixed migrate task for mysql

MySQL uses NOW(), sqlite datetime() - needed to abstract this function call
mysql db.exec() supports multiple statements

(needed for migrations, reset etc.)
Fixed mysql db.clear()
Reset restores backup on error
fixed mysql db.dump()