Include sha256 hash in list.json (for easier commandline validation)

Author: axic

update

@@ -39,6 +39,7 @@ fs.readdir(path.join(__dirname, '/bin'), function (err, files) {
     .map(function (pars) {
       const fileContent = readFile(pars.path)
       pars.longVersion = buildVersion(pars)
+      pars.sha256 = '0x' + ethUtil.sha256(fileContent).toString('hex')
       pars.keccak256 = '0x' + ethUtil.sha3(fileContent).toString('hex')
       pars.urls = [ 'bzzr://' + swarmhash(fileContent).toString('hex') ]
       return pars