Top Stories Of The Day: 1)6000 Railway Stations To Be WiFi-Enabled In Next 6 Months: Piyush Goyal, 2)Berkshire Hathaway Takes Stake In Paytm, 3)Satya Tripathi Appointed Asst Secretary-General Of UN Environment Agency, 4)Pact Signed By 2 Union Ministries, MP, Maharashtra For Indore-Manmad Rail Project, 5)SBI Changes Names, IFSC Codes Of Nearly 1,300 Branches