Unofficial Development Kit for Espressif ESP8266 v2.0.9

• Update SDK v1.5.0 (folder ESP8266_SDK);
• Update RTOS SDK v1.3.0 (folder ESP8266_RTOS_SDK);
• Update Espressif MESH SDK (beta) (folder ESP8266_MESH_SDK);
• SDK version 1.3.0 moved to a folder ESP8266_SDK_130;
• SDK version 1.4.1 Pre5 moved to a folder ESP8266_SDK_141;
• Update a utility "utils\esptool-ck.exe" to version 0.4.6-2:
• Updated documentation:
  • Delete files:
    • 2A-ESP8266__IOT_SDK_User_Manual__EN_v1.3.0.pdf
    • 2B-ESP8266__SDK__IOT_Demo__EN_v0.6.pdf
    • 2C-ESP8266__SDK__Programming Guide__EN_v1.3.0.pdf
    • 20A-ESP8266__RTOS_SDK__Programming Guide__EN_v1.0.5.pdf
  • Added files:
    • 2A-ESP8266__IOT_SDK_User_Manual__EN_v1.4.pdf
    • 2B-ESP8266__SDK__IOT_Demo__EN_v1.3.pdf
    • 2C-ESP8266__SDK__Programming Guide__EN_v1.5.pdf
    • 3A_ESP8266_Flash_tool_user_manual_EN_v1.0.pdf
    • 20A-ESP8266__RTOS_SDK__Programming Guide__EN_v1.3.0.pdf
    • 20B-ESP8266__RTOS_SDK_API Reference__v1.3.0.pdf
• Updated examples:
  • sysinfo;
  • esp_mesh_sdk_app_controller;
  • esp_mesh_sdk_app_light;
  • esp_mesh_sdk_app_switch;
  • esp_rtos_sdk_example;
  • esp_rtos_sdk_example_2;
  • nodemcu-firmware;
  • at;
  • lwip_open_demo_app;
  • dht22_thingspeak;
• Added examples:
  • rboot;
  • SPI_slave;
  • I2S_Demo;
  • PWM_Demo;
  • UART_TCP_Passthrough_Demo;