Add developers information to POM

Maven Central requires the POM to contain a developers section.

Author: cboehme

build.gradle

@@ -102,6 +102,28 @@ gradle.projectsEvaluated {
       }
       url 'https://github.com/culturegraph/metafacture-core'
       inceptionYear '2011'
+      developers {
+        developer {
+          id 'mgeipel'
+          name 'Markus M. Geipel'
+          email '[email protected]'
+          url 'https://github.com/mgeipel'
+          roles {
+            role 'architect'
+            role 'developer'
+          }
+        }
+        developer {
+          id 'cboehme'
+          name 'Christoph Böhme'
+          email '[email protected]'
+          url 'https://github.com/cboehme'
+          roles {
+            role 'architect'
+            role 'developer'
+          }
+        }
+      }
       organization {
         name 'Deutsche Nationalbibliothek'
         url 'http://dnb.de/'