add build plan info to matrix

[cartazio]

would be great to know what versions of deps were picked by different combinations that build /fail

[cartazio]

8:34 PM <hvr> curl -s https://matrix.hackage.haskell.org/api/v2/units/$JID/deps  | jq -C . | less -R
8:34 PM <hvr> curl -s https://matrix.hackage.haskell.org/api/v2/units/$JID  | jq -C . | less -R
8:34 PM <hvr> the JID is the UUID you see in the /ng UI
8:34 PM <hvr> for a given cell
8:35 PM <hvr> in future that information is supposed to be provided pretty printed in the UI proper
8:35 PM <hvr> but for now, you have to make due with the webservice

[hvr]

Duplicate of #52

[cartazio]

so an example would https://matrix.hackage.haskell.org/api/v2/units/3f37c48a-df20-c7e6-8fbf-07d4d861e24d/deps