Add download url to documentation
* - \ref ESP_APP_MQTT_CLIENT for MQTT connection
* - Embeds other AT features, such as \ref ESP_WPS, \ref ESP_PING, \ref ESP_HOSTNAME and others
*
- * \section sect_resources Resources
+ * \section sect_resources Download & Resources
*
- * - Read \ref page_faq before you choose this library
+ * - <a class="download_url" href="https://github.com/MaJerle/ESP_AT_Lib/releases">Download library from Github releases</a>
* - Read \ref page_appnote before you start development
* - <a href="https://github.com/MaJerle/ESP_AT_Lib">Official development repository on Github</a>
* - <a href="http://www.espressif.com/sites/default/files/documentation/4a-esp8266_at_instruction_set_en.pdf">Official AT commands instruction set by Espressif systems</a>
