v0.4.0 Empress (CRAN)

• IMPROVE: as.Node.data.frame and FromDataFrameTable now support paths containing reserved words (#65)
• CHANGE: Node$new now checks that names are not reserved names. As a consequence, many conversions to Node now contain a check parameter.
• IMPROVE: Climb is now much faster when climbing by name (#71)
• IMPROVE: As a result of #71, many other functions are much faster, e.g. FromDataFrameTable (#72)