added colons to lines in readme referencing code blocks
added colons to lines in readme referencing code blocks

mark-rushakoff/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,influxdata/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,nooproblem/influxdb,li-ang/influxdb,nooproblem/influxdb,influxdb/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,influxdata/influxdb,mark-rushakoff/influxdb,influxdb/influxdb,nooproblem/influxdb,li-ang/influxdb