implement a marker ribbon to highlight projects with SPL data available
fix comment formatting in metrics_retrieval sql scripts
add script to start dashboard shiny app directly which give better logging
add generic widget template
add generic html template for justgage gauge outputs
moved widget template
add mustache.js template library
add javascript, stylesheets and mustache templates for spl metrics table
add spl database queries and data processing for release metrics
add implementation for release metrics table widget
fixes: pathname to mustache templates was wrong
display absolute differences in tooltip, mark change direction with an arrow symbol
highlight metric values based on importance of the change
refactor: metrics difference and change as generic functions,

fixes wrong percentage calculation
adapt importance function to now correct percentage values
add metrics SD, TD, AND, FPFC to metrics table widget
add loading animation to metrics table widget