Merge pull request #371 from fgiannar/develop

Updates #336
Merge pull request #372 from fgiannar/develop

updates #366
Merge pull request #373 from fgiannar/develop

updates #366 #367
Changes in seed
Merge pull request #374 from fgiannar/develop

Csn Improvements
Merge pull request #375 from fgiannar/develop

Minor csn layout changes
Merge pull request #84 from cassandra-project/develop

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