Svir viewer sub

This PR includes all the bits and pieces needed for the SVIR integrated risk viewer application. This application allows users to view and interact with SVIR data processed by the SVIR QGIS tool. Users can modify the weights of indicators. Users can view PCP charts for the IRI, Category and Primary SVIR indicators by selecting districts from the map.
The Primary PCP chart allows the user to alter the outlier break point the allowing them to identify the outliers more easily. This chart also features the mean path of all the indicators plotted, again thus allowing the user to visualize more easily the outliers. 
To write reusable code global variables must be user when no alternatives are viable only.
I checked some of these vars and seems not used in this file, could you check if are required or not?