Add Cmax and MTD from Integrity

[andrewsu]

From an email from Arnab 2020-03-10: "Add Cmax and MTD from Integrity into the portal. This is a one to many relationship so this needs some work."

[sebotic]

I have parsed the Integrity Cmax XML files and generated CSV files. This can be used to design an extended data model for ES. This needs then integration into the frontend.

There are several points which need to be adressed:

• One compound typically has more than one associated Cmax test conditions
• The Cmax values only make sense when presented together with their test condition
• The Cmax assays contain administered compounds and measured compounds, a decision needs to be made which to associate a Reframe compound with. (probably the measured one)
• When parsing the XML files, I noticed that the compound ID of some Cmax assays were not present in the Integrity compounds list. Need to follow up on that.