feat: Add bucket schema management commands (#52)

* feat: update generated client to include schema-management APIs
* feat: implement interfaces to decode flags and CSV
* feat: implement decoders for different measurement schema column formats
* feat: extend bucket CLI commands to support schema type property
* feat: add CLI commands to manage measurement schema
* test: add unit tests for bucket schema create, update and list commands

cmd/influx/main.go

@@ -198,6 +198,7 @@ var app = cli.App{
 		newWriteCmd(),
 		newBucketCmd(),
 		newCompletionCmd(),
+		newBucketSchemaCmd(),
 	},
 }