AQL API Changes

• fixed issue #12
  • added auto reconnection when connection breaks
  • added fallback server endpoints
• added new cursor implementation for AQL queries
  • DocumentCursor executeDocumentQuery(...)
  • VertexCursor executeVertexQuery(...)
  • EdgeCursor executeEdgeQuery(...)
• added new cursor implementation for simple queries
  • DocumentCursor executeSimpleAllDocuments(...)
  • DocumentCursor executeSimpleByExampleDocuments(...)
  • DocumentCursor executeSimpleRangeWithDocuments(...)
  • DocumentCursor executeSimpleFulltextWithDocuments(...)
• added some examples for AQL queries
  (see src/test/java/com/arangodb/example)

Traversal API

added the ArangoDB traversal API