6.3

## Adds:

* New query string options that can be combined and used with any output format (including single field output)
  *  Limit results to number: `?latest=10`
  *  Output every Nth record: `?sample=4`
  *  Start output at offset: `?offset=2`
*  Latest record: `/output/PUBLICKEY/latest` in all formats
*  Return only output for one field: `/output/PUBLICKEY/FIELDNAME`
*  Return only latest value of field: `/output/PUBLICKEY/FIELDNAME/latest`
*  Atom 1.0 feed output
*  MySQL output
*  PostgreSQL output

## Examples:
Here's the full data set for the test stream: http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?page=1

### Query String Additions
*  **Limit to latest 5 records:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?limit=5
*  **Offset by 2 records:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?limit=5
*  **Offset 2 and limit 10:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?limit=10&offset=2
*  **Get every 4th record:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg?sample=4

### Single Field Output
*  **Only return the index field:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/index
*  **Combine with the query string changes and get the latest 5 values for the index field:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/index?limit=5

### New Formats
*  **Atom:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg.atom?page=1
*  **MySQL:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg.sql?page=1
*  **PostgreSQL:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg.psql?page=1

### Latest record or field
*  **Latest record in JSON:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/latest.json
*  **Latest value for the timestamp field:** http://phantmqtt.sparkfun.com/output/BDPQQyM6pvf73kaRE2Ppc6z2Mwg/timestamp/latest