Change DogeAPI to Block.io

I corrected English sentences
(https://github.com/dogecoin/dogecoin.com/pull/53#discussion-diff-19197919
https://github.com/dogecoin/dogecoin.com/pull/53#discussion-diff-19198085)
and deleted Moolah.
Update index.html
Update index.html
Merge pull request #60 from Kirvx/Test

Change DogeAPI to Block.io