back out minimal pom.xml with licesnse (#79)

- deploy failed for unknown reasons:

Deploying /- to repository clojars as ***
Sending ///pom//-pom.jar (3k)to https://clojars.org/repo/
Could not transfer artifact /:/:jar:pom from/to clojars (https://clojars.org/repo): transfer failed for https://clojars.org/repo/////pom//-pom.jar, status: 400 Bad Request
Sending ///jar//-jar.jar (25k)to https://clojars.org/repo/
Could not transfer artifact /:/:jar:jar from/to clojars (https://clojars.org/repo): transfer failed for https://clojars.org/repo/////jar//-jar.jar, status: 400 Bad Request
Execution error (TransferFailedException) at org.apache.maven.wagon.shared.http.AbstractHttpClientWagon/put (AbstractHttpClientWagon.java:835).
transfer failed for https://clojars.org/repo/////pom//-pom.jar, status: 400 Bad Request

.gitignore

@@ -20,6 +20,7 @@
 /classes
 /config.edn
 /lib
+/pom.xml
 /pom.xml.asc
 /profiles.clj
 /resources/public/js/main.js