Do not abort on uncaught exception

The following anywhere in the process will cause magellan to abort and exit:
require('fs').createReadStream( '/tmp/' );

This prevents that.

bin/magellan

@@ -11,6 +11,10 @@ const cli = require("../src/cli");
 const settings = require("../src/settings");
 const constants = require("../src/constants");
 
+process.on('uncaughtException', function (error) {
+  console.error("Magellan uncaughtException", error);
+});
+
 co(function *() {
   cli.version();