Changlog after Gem 0.79

• OrientQuery: (Match-Syntax) methods connect and statement return an OrientQuery-Object instead of a Matchstatement.
• Delete: Class#delete, Vertex#delete removed any record when called without a condition. Now: all: true is required

  SomeClass.delete all: true   # leads to an empty class

• Edge.create: To put attributes (properties) to the edge, the keyword »set« is used. We are following the syntax of OrientDB#CreateEdge. As for Vertex#Create, the keyword :set is optional.