Amazon on Wednesday refreshed its Kindle Paperwhite e-book reader with an improved display and some new software features. The Kindle Paperwhite will continue to retail at Rs. 10,999 for the Wi-Fi only variant and Rs. 13,999 for the 3G variant. The new models will start shipping on June 30. Interestingly, the previous generation Paperwhitemodels continue to be listed on Amazon …