Fix bugs in Avg Coin Age and % Coin-days Destroyed
Fix bugs in Avg Coin Age and % Coin-days Destroyed

ultracoindev/ultracoin-abe,BuckyGreen/latiumexplorer,BuckyGreen/latiumexplorer,Max-Coin/maxcoin-abe,MatthewLM/PeercoinAbeExplorer,BuckyGreen/latiumexplorer,sacarlson/bitcoin-abe,ultracoindev/ultracoin-abe,MatthewLM/PeercoinAbeExplorer,gjhiggins/chaincoin-abe,Cybnate/NuBits-Abe-explorer,MatthewLM/PeercoinAbeExplorer,BuckyGreen/latiumexplorer,machado-rev/HTMLCoinExplorer,gjhiggins/abe-bee2,machinecoin-project/machinecoin-blockchainexplorer-abe,machado-rev/HTMLCoinExplorer,gjhiggins/abe-bee2,Serya05/bitcoin-abe,machinecoin-project/machinecoin-blockchainexplorer-abe,cryptapus/bitcoin-abe,leadcoin-reboot/leadcoin-abe,jonnynewbs/bitcoin-abe,mmitech/bitcoin-abe,jeromewu/bitcoin-abe-opennet,gjhiggins/abe-bee2,UdjinM6/darkcoin-abe,Cybnate/NuBits-Abe-explorer,n00bsys0p/altcoin-abe,gjhiggins/chaincoin-abe,CraigsCoin/abe-craigscoin,jonnynewbs/bitcoin-abe,muchbeli/bitcoin-abe,cryptapus/bitcoin-abe,Dilmacoin/dilmacoin-abe,CraigsCoin/abe-craigscoin,muchbeli/bitcoin-abe,not2bforgotten/bitcoin-abe,Dilmacoin/dilmacoin-abe,ultracoindev/ultracoin-abe,machado-rev/HTMLCoinExplorer,n00bsys0p/altcoin-abe,muchbeli/bitcoin-abe,Cybnate/NuBits-Abe-explorer,Rimbit/RimbitExplorer,Rimbit/RimbitExplorer,gjhiggins/altcoin-abe,ultracoindev/ultracoin-abe,Cybnate/NuBits-Abe-explorer,jeromewu/bitcoin-abe-opennet,machado-rev/HTMLCoinExplorer,Max-Coin/maxcoin-abe,Cybnate/NuBits-Abe-explorer,MatthewLM/PeercoinAbeExplorer,UdjinM6/darkcoin-abe,Rimbit/RimbitExplorer,ultracoindev/ultracoin-abe,jeorgen/bitcoin-abe,mmitech/bitcoin-abe,jeorgen/bitcoin-abe,leadcoin-reboot/leadcoin-abe,gjhiggins/altcoin-abe,Rimbit/RimbitExplorer,muchbeli/bitcoin-abe,Serya05/bitcoin-abe