[#113,docs/tutorial][l]: tutorial-basics written giving introduction to dataset and associated functionality.

* Minor corrections to several other parts of docs.

_includes/tutorial-basics-ex-events.js

@@ -0,0 +1,13 @@
+function onChange() {
+  $('.ex-events').append('Queried: ' + dataset.queryState.get('q') + '. Records matching: ' + dataset.recordCount);
+  $('.ex-events').append('<br />');
+}
+
+dataset.currentRecords.bind('reset', onChange);
+
+dataset.query({q: 'DE'});
+dataset.query({q: 'UK'});
+dataset.query({q: 'US'});
+
+dataset.unbind('reset', onChange);
+