Changes & improvements:
-enabled data import through URL
-removed unnecessary comments from code
-updated the ReadMe
-updated the about.html
-removed legend for clusters
-added support for Date format: [yyyy-mm-dd] can be used as an x-variable
-fixed a bug that prevented use of only single condition
-implemented dark theme
-improved visibility of axes
-allow bigger files for upload
-bug fixed that prevented correct setting of the time window for clustering