Add description of provided files for cyclodextrin case

host_guest/cyclodextrin_derivatives/README.md

@@ -42,3 +42,11 @@ Note that we have typically selected reasonable protonation states and conformer
 - Hosts: `host_files`: Folder containing beta cyclodextrin plus the eight other cyclodextrin derivative hosts, provided by Katy Kellett and Michael Gilson, initially only in PDB format with all protons present. The Chemdraw files are also provided. MOL2 and SDF files of the hosts were added on 7/18/19.
 - Guests: `guest_files`: Contains MOL2, PDB and SDF files and files containing the isomeric SMILES strings and codenames of the guests.
 - Images: `images`: Folder containing images of the guest and host structures for this challenge in JPG and PDF format.
+
+**Source files**:
+- PDB files of all hosts from the Gilson lab, which served to generate host sdf and mol2 files
+- SMILES strings for the guests, which were used to generate PDB and SDF files for the guests, as well as names
+
+**Auxiliary files**:
+- ChemDraw files of all hosts from the Gilson lab
+- mol2 files for the guests from the Gilson lab