* Editor of the roughness-material table for the estimation of roughness
according to material and age
* New option to import and export patterns/curves in CSV format
* New tool to import base demands at junctions (single or multiple) and its Id
patterns from CSV file
* Added import of service connections from SHP
* New tool to obtain the minimum spanning tree of the network
* Updated the Epanet library to version 2.2
* Improved the interface for converting roughness coefficients
* Fixed error when displaying quality results
* Refresh of current units and headloss formula in the status bar when loading a
QGis project
* Projects imported from INP are now also displayed in the list of projects
* Fixed error when nodes have no coordinates
* Negative lengths are now avoided when inserting valves or pumps
* Fixed error to access Patterns when TimeStep Pattern is 0:00
* Service connections are now read correctly
