refs #57 started to work on movers and shakers and lots of minor improvements

core/Twig.php

plugins/Insights/API.php

plugins/Insights/Controller.php

plugins/Insights/DataTable/Filter/ExcludeLowValue.php

plugins/Insights/DataTable/Filter/Insight.php

plugins/Insights/Insights.php

plugins/Insights/Visualizations/Insight.php

plugins/Insights/lang/en.json

plugins/Insights/stylesheets/insightVisualization.less

plugins/Insights/templates/index.twig

plugins/Insights/templates/insightControls.twig

plugins/Insights/templates/insightVisualization.twig

plugins/Insights/templates/overviewWidget.twig

plugins/Insights/templates/table_header.twig

plugins/Insights/templates/table_row.twig

plugins/Insights/tests/FilterExcludeLowValueTest.php

plugins/Insights/tests/FilterInsightTest.php