Added c3.css and c3.min.js for a completed c3 lib for data visualization in eventsum.
Added a new customized class of time range picker to pick time range.
Additionally, a minor change in component.css to tweak the alignment of line numbers in syntax highlight so that it can show a full 4 digit line numbers.
Added c3.css and c3.min.js for a completed c3 lib for data visualization in eventsum. Added a new customized class of time range picker to pick time range. Additionally, a minor change in component.css to tweak the alignment of line numbers in syntax highlight so that it can show a full 4 digit line numbers.