OpenQuake Platform 1.4.0

[Matteo Nastasi (@nastasi-oq)]

• Taxtweb: add platform header and footer (with code rearrangement)
• Firefox update management to avoid selenium malfunctions
• Taxtweb: add contextual help system
• Use oq-risklib as library to check nrml validity
• Add default group and 'staff' capability for new users
• Improved selenium test suite with users and secondary profiles
  management

[Paolo Tormene (@ptormene)]

• irv: fix a bug in the addition of new project definitions, enabling
  to select the added items and removing some delays
• irv: when adding a new project definition, leverage the svir api to check for
  the uniqueness of the project definition title
• irv: let the d3 tree layout look like in the QGIS IRMT plugin
• irv: handle case in which a zone with no available data is clicked on the map
• irv: when switching project definition, restyle the map accordingly
• irv: display charts in separate widgets instead of tabs
• irv: fix displaying the 'median' text when moving the mouse over a median line
• irv: enable zooming/panning for all d3 charts