Release 1.5.0 for Neo4j 4.0

This release contains updates for Neo4j 4.0

• Signed for Neo4j Desktop 1.2.5 with new certificate
• support of Neo4j 4.0 databases incl multi-database
• replaced neo4j-import with neo4j-admin import for bulk import
• added UNWIND option for cypher batching
• added multi-db support for online import
• updated neo4j driver to 4.0.1
• added support for streaming data directly from relational database without intermediate CSV files
• fix camel case property names in UI

Thanks a lot to @conker84 and @mroiter-larus for all your hard work!