0.5.13 Bug fixes and minor updates

- Solves Issue 156, 158, 159
- Uncheck "Reboot after save" by default, It is only madatory if an inverter is added or changed (name,address)
- Add "*" to denote mandatory fields in setup
- Remove "MQTT Interval read only" in setup
- Correct typos in Markdown files

tools/esp8266/html/setup.html

@@ -109,8 +109,6 @@
                         <input type="text" class="text" name="mqttPwd" value="{MQTT_PWD}"/>
                         <label for="mqttTopic">Topic</label>
                         <input type="text" class="text" name="mqttTopic" value="{MQTT_TOPIC}"/>
-                        <label for="mqttIntvl">Interval [s] (read-only)</label>
-                        <input type="text" class="text" name="mqttIntvl" value="{MQTT_INTVL}" readonly/>
                     </fieldset>
                     </div>