GraphQL parsing and pretty printing via API

• GraphQL related improvements (see Issue 44)

• Adding ECAL scripting support
• Adding a game example

• Adding clustering example
• Removing old integrations
• Adding a logo
• Various smaller fixes

This release includes:

• Proper clustering support
• A clustering example
• GraphQL support

This release includes:

• A mature REST API giving fine-grained control of a running DB server
• Optional authentication and access control
• Command line access via a console
• All data is fully indexed as values and phrases
• EQL as powerful query language
• Mature import/export facilities
• Database can be run In-Memory