Update header.php

Add Korean Whitepaper
Create peercoin-paper-kr.pdf

Link to the Korean Translation of the Peercoin Whitepaper
Delete peercoin-paper-kr.pdf
Added Korean Translation of Peercoin Whitepaper

Added Korean Translation of Peercoin Whitepaper
	new file:   img/mining7.png Ecoining pool image
	new file:   img/mining8.png Ecoining pool image
	new file:   img/mining9.png Ecoining pool image
	modified:   mining.php Added Ecoining pool guide & resources & wallet guide links