alphabetize api endpoints, add /api/v2/query endpoint, add write example, related to #2758
alphabetize api endpoints, add /api/v2/query endpoint, add write example, related to #2758

influxdb/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,influxdb/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,influxdb/docs.influxdata.com