Merge pull request #329 from vikramrajkumar/master

Fixes
JSON fixes
json fixes wallet.json
dns.api json fixes
Merge pull request #332 from mauritso1/patch-3

Json fixes
fix build, undo-ing last pull request
fix/rename delegate enable/disable method
fix CLI prompt on empty command
Implement RPC call to get a block's signing delegate's name (resolves #319)