Create classes to handle a connection and to send data

[sandrokeil]

First, we need a connection class. The ArangoDBClient/Connection.php is a good blueprint, but we have to use the fuerte style / features.

Requirements

• Handling of different databases, maybe one connection for every database
• Async handling of different requests, use callable ?
• Request / Response classes
• Connection option class / constants

Questions

• Should we share a connection between HTTP Requests / CLI ? We use bi-directional async velocystream protocol.

[sandrokeil]

The only missing piece is different database handling.