Add grapetree link in front end and pipe api into the link

[Fattigman]

Add links in the front end as described in #91

[Fattigman]

Grapetree can be found on https://34.125.210.143/grapetree/

[moedarrah]

The link is not working @Fattigman

[Fattigman]

We changed it in #119 https://34.125.84.98/grapetree/

[moedarrah]

Done: https://github.com/genomic-medicine-sweden/docker-sc2reporter/pull/130