Merge pull request #14 from FreekDB/master

Fixed some more Checkstyle issues and other small changes
Refactored the createChartFrame method.
Disabled the cyan background color for the pipeline status to test a different color scheme.
Added several todo items.
Changed some names, introduced METRICS_SEPARATOR constant, made some variables final, added and changed Javadocs, removed unnecessary initialization and fixed other minor Checkstyle issues.