Adding 4 hypernodes , removing 1

Adding 4 hypernodes , removing 1
Merge pull request #87 from xnljfr/master

Adding 4 hypernodes , removing 1
remove bitcoin references
Merge pull request #92 from OwenVersteeg/patch-2

remove bitcoin references
checkpoint
checkpoints
Merge pull request #97 from billym2k/master

checkpoints for fork
Merge branch 'master' of github.com:dogecoin/dogecoin