Update index.php

Added stats Avg PoS coins and Avg PoW coins last 1h/24h
Added Functionality to allow Averages for coins
Update stats.php

Ran into a bug. I never knew there was a type of block called "proof-of-stake stake-modifier". This ended up ruining the accuracy of the POS/POW block counts and became noticeable with the averages for POW blocks.
Update index.php

Ran into a bug. I never knew there was a type of block called "proof-of-stake stake-modifier". This ended up ruining the accuracy of the POS/POW block counts and became noticeable with the averages for POW blocks.
Merge pull request #29 from Hibero/master

Added stats Avg PoS coins and Avg PoW coins last 1h/24h