v5.6.4

ReactiveMP v5.6.4

Diff since v5.6.3

Merged pull requests:

• Robust invS in outgoing Λ-rule of MvNormalMeanPrecision-node (#540) (@skoghoern)
• #549 Add MessageMapping docs (#550) (@abpolym)
• Fix bug average energy of Uninformative type (#553) (@mhidalgoaraya)

Closed issues:

• Add new node implementing Jaakkola & Jordan’s lower bound on sigmoid (log-sigmoid) in Bishop PRML (#507)
• Tutorial for the logistic sigmoid node (#530)
• What is message mapping? (#549)