Merge pull request #640 from CoiniumServ/develop

v0.2.4 release
Merge pull request #643 from CoiniumServ/develop

more exception handlers
Merge pull request #645 from CoiniumServ/develop

updates
Update README.md
Merge pull request #648 from Caberhagen/patch-3

Update README.md
Create dogeblackcoin.json
Create peercoindark.json
Merge pull request #655 from patricbr/patch-3

Create peercoindark.json
Update peercoindark.json
Merge pull request #654 from patricbr/patch-2

Create dogeblackcoin.json
Update dogeblackcoin.json
Merge branch 'master' of github.com:CoiniumServ/CoiniumServ into develop
added icon for peercoindark, closes #657