Added host/port parameters, passed to postgresql handler.
Passed to host/port parameters to mysql handler.
Passed to host/port parameters to mongodb handler.
Reverted accidental type change to PostgreSQL port.
Added length to varchar types, which some postgresql-compatible databases require (such as FoundationDB SQL Layer).
Updated README with notes about the host and port argument, using with FoundationDB SQL Layer
Merge pull request #4 from jrullmann/configurable-host-and-port

FoundationDB SQL Layer Support