Merge pull request #545 from stan-dev/new-contributors

Add new contributors to DESCRIPTION file

Author: jgabry

DESCRIPTION

@@ -14,7 +14,9 @@ Authors@R: c(person("Jonah", "Gabry", role = c("aut", "cre"), email = "jgabry@gm
              person("Aki", "Vehtari", role = "ctb"), 
              person("Behram", "Ulukır", role = "ctb"), 
              person("Visruth", "Srimath Kandali", role = "ctb"),
-             person("Mattan S.", "Ben-Shachar", role = "ctb"))
+             person("Mattan S.", "Ben-Shachar", role = "ctb"),
+             person("Ishaan", "Arora", role = "ctb"),
+             person("Utkarsh", "Pawade", role = "ctb"))
 Maintainer: Jonah Gabry <jgabry@gmail.com>
 Description: Plotting functions for posterior analysis, MCMC diagnostics,
     prior and posterior predictive checks, and other visualizations