Add lbry.publish()

js/lbry.js

@@ -151,6 +151,11 @@ lbry.revealFile = function(path, callback) {
   lbry.call('reveal', { path: path }, callback);
 }
 
+lbry.publish = function(params, callback) {
+  // Use ES6 named arguments instead of directly passing param dict?
+  lbry.call('publish', params, callback);
+}
+
 lbry.getVersionInfo = function(callback) {
   lbry.call('version', {}, callback);
 };