README: modify information of Tizen RT
README: modify information of Tizen RT

We will add many documents at docs folder. This is noticed at README.

sunghan-chang/TizenRT,pillip8282/TizenRT,chanijjani/TizenRT,jsdosa/TizenRT,HONGCHAEHEE/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,davidfather/TizenRT,JeonginKim/TizenRT,btheosam/TizenRT,davidfather/TizenRT,btheosam/TizenRT,an4967/TizenRT,davidfather/TizenRT,jeongchanKim/TizenRT,heejin-kim/TizenRT,JeonginKim/TizenRT,lokeshbv/TizenRT,jeongarmy/TizenRT,heejin-kim/TizenRT,an4967/TizenRT,chanijjani/TizenRT,Samsung/TizenRT,JeongJunSik/TizenRT,HONGCHAEHEE/TizenRT,jeongchanKim/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,JeonginKim/TizenRT,lokeshbv/TizenRT,Samsung/TizenRT,heejin-kim/TizenRT,Samsung/TizenRT,davidfather/TizenRT,shivgarg/TizenRT,heejin-kim/TizenRT,JeongJunSik/TizenRT,davidfather/TizenRT,an4967/TizenRT,HONGCHAEHEE/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,sunghan-chang/TizenRT,lokeshbv/TizenRT,JeongJunSik/TizenRT,jeongchanKim/TizenRT,jeongarmy/TizenRT,HONGCHAEHEE/TizenRT,btheosam/TizenRT,jeongarmy/TizenRT,jsdosa/TizenRT,heejin-kim/TizenRT,davidfather/TizenRT,davidfather/TizenRT,lokeshbv/TizenRT,btheosam/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,Samsung/TizenRT,chanijjani/TizenRT,shivgarg/TizenRT,JeongJunSik/TizenRT,JeonginKim/TizenRT,junmin-kim/TizenRT,chanijjani/TizenRT,shivgarg/TizenRT,JeonginKim/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,Samsung/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,btheosam/TizenRT,an4967/TizenRT,pillip8282/TizenRT,lokeshbv/TizenRT,JeonginKim/TizenRT,HONGCHAEHEE/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,shivgarg/TizenRT,an4967/TizenRT,lokeshbv/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,chanijjani/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,heejin-kim/TizenRT,shivgarg/TizenRT,chanijjani/TizenRT,jeongchanKim/TizenRT,chanijjani/TizenRT,junmin-kim/TizenRT,sunghan-chang/TizenRT,jsdosa/TizenRT,jeongarmy/TizenRT,shivgarg/TizenRT,jeongarmy/TizenRT,junmin-kim/TizenRT,btheosam/TizenRT,JeongJunSik/TizenRT,jsdosa/TizenRT,jeongchanKim/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,jsdosa/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,JeongJunSik/TizenRT,HONGCHAEHEE/TizenRT