merge and download button implementation

angular.json

app-test/icons.html

app-test/legend_image.html

app-test/show_and_hide_elements.html

drugstone-test.html

netex/assets/styles/fonts/primeicons.eot

netex/assets/styles/fonts/primeicons.svg

netex/assets/styles/fonts/primeicons.ttf

netex/assets/styles/fonts/primeicons.woff

netex/assets/styles/images/color.png

netex/assets/styles/images/hue.png

netex/assets/styles/images/line.gif

netex/assets/styles/images/loading.gif

netex/assets/styles/images/password-meter.png

netex/assets/styles/primeicons.css

netex/assets/styles/primeng.min.css

netex/assets/styles/theme.css

package-lock.json

package.json

releases/release_tag.sh