Update main.cpp

reward system changed

 if(nHeight < 200000) {nSubsidy = 11.5 * COIN;} 

		if(nHeight < 300000)	
		{
		nSubsidy *= 5;
		}
		
		if(nHeight < 400000)	
		{
		nSubsidy *= 3;
		}
		
		if(nHeight < 500000)	
		{
		nSubsidy *= 23;
		}
		if(nHeight < 510000)	
		{
		nSubsidy *= 1;
		}
    return nSubsidy + nFees;
}