added collaborator banners

src/app/app.component.scss

src/app/app.module.ts

...s/other/tools-banner/tool-panel/tool-panel.component.html

...s/other/tools-banner/tool-panel/tool-panel.component.scss

...ther/tools-banner/tool-panel/tool-panel.component.spec.ts

...nts/other/tools-banner/tool-panel/tool-panel.component.ts

...components/other/tools-banner/tools-banner.component.html

...components/other/tools-banner/tools-banner.component.scss

...ponents/other/tools-banner/tools-banner.component.spec.ts

...p/components/other/tools-banner/tools-banner.component.ts

src/app/pages/home/home.component.html

src/app/pages/home/home.component.scss

src/assets/tools/biocypher.png

src/assets/tools/domino.png

src/assets/tools/graphsimviz.png

src/assets/tools/hitseekr.png

src/assets/tools/iquery.png

src/assets/tools/iquery.svg

src/assets/tools/navigator.png

src/assets/tools/ndex.png