Fix changelog (double issue entry and missing version headline)

CHANGELOG.md

@@ -19,7 +19,6 @@ it allows you to add queries of differnet data source types & instances to the s
 - [Issue #2577](https://github.com/grafana/grafana/issues/2577). Panel: Resize handles in panel bottom right corners for easy width and height change
 - [Issue #2457](https://github.com/grafana/grafana/issues/2457). Admin: admin page for all grafana organizations (list / edit view)
 - [Issue #1186](https://github.com/grafana/grafana/issues/1186). Time Picker: New option `today`, will set time range from midnight to now
-- [Issue #1186](https://github.com/grafana/grafana/issues/1186). Time Picker: New option `today`, will set time range from midnight to now
 - [Issue #2647](https://github.com/grafana/grafana/issues/2647). InfluxDB: You can now set group by time interval on each query
 - [Issue #2599](https://github.com/grafana/grafana/issues/2599). InfluxDB: Improved alias support, you can now use the `AS` clause for each select statement
 - [Issue #2708](https://github.com/grafana/grafana/issues/2708). InfluxDB: You can now set math expression for select clauses.
@@ -53,7 +52,7 @@ Grunt & Watch tasks:
 - `grunt watch`: will watch for changes to less, and typescript files and compile them to public_gen, and for other files it will just copy them to public_gen
 
 
- 2.1.3 (2015-08-24)
+# 2.1.3 (2015-08-24)
 
 **Fixes**
 - [Issue #2580](https://github.com/grafana/grafana/issues/2580). Packaging: ldap.toml was not marked as config file and could be overwritten in upgrade