Update README.md

README.md

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 CALDER is a Hi-C analysis tool that allows: (1) compute chromatin domains from whole chromosome contacts; (2) derive their non-linear hierarchical organization and obtain sub-compartments; (3) compute nested sub-domains within each chromatin domain from short-range contacts. CALDER is currently implemented in R.
 
-Overview of the CALDER method:
+* Overview of the CALDER method:
 ![Alt text](./img/CALDER_methods.png "CALDER methods")
 
-Calder connects chromatin 3D organization to genomic function:
+* Calder connects chromatin 3D organization to genomic function:
 ![Alt text](./img/CALDER_features.png "CALDER features")