Systematics and Intrinsic Alignment

[felipeaoli]

Check the IA terms options available in TJPCov interface and verify how this is being passed to ccl.
We now have a single parameter called IA in the yaml configuration file.
Desirable action items would be

• Verify what was passed to CCL now and how this modifies the C_\ell
• Check how CCL produces NLA and TATT
• Check if we should create a new field for each kind of IA modeling
• Implement the modifications