4.0.0-pre3

A routing checkpoint on the way to 4.0.0.

Improvements:

• User-defined properties can be added to Candidate as userFloats, etc.
• Class Dataset now provides a label to identify the source (MiniAOD) dataset.
• Dataset::AddFile now supports glob-like masks.
• User-defined search locations are supported in FileInPath.
• Pile-up profile in simulation is now read from a ROOT file instead of being hard-coded.
• Logical OR of multiple triggers is allowed in selection.
• Event reweighting plugins migrated to a standard interface EventWeightPlugin, and a weight collector plugin is added.
• A service to request systematic variations is provided.
• Systematic variations in PECJetMETReader implemented.
• LeptonSFWeight now computes systematic variations.
• Access to jet pile-up ID is provided.
• Jet corrector machinery updated. Correctors are not implemented as services. A standard plugin to recorrect jets and MET is added (JetMETUpdate).
• Non-trivial dependencies are allowed for plugins. They are always executed in the order of registration, but if some of dependencies of a plugin have not been run or have rejected current event, this plugin is not executed. This allows to split processing into multiple branches.
• RunManager can now print a summary with event counts.

Updates:

• PECReader module is updated to PEC classes of version 3.1.1. This includes access to electron supercluster pseudorapidity.
• Pile-up profiles, b-tagging efficiencies and scale factors updated to 76X.