Add LIST related tokens to scanner
influxql: make LIST SERIES support WHERE & LIMIT
influxql: change ORDER BY to accept a field list

Change ORDER BY to accept a field list and change LIST SERIES
statement to allow ORDER BY.
influxql: only accept LIMIT values > 0
influxql: add LIST MEASUREMENTS, TAGS, & FIELDS
influxql: capitalize LIMIT in error message
go fmt
influxql: move ORDER BY parsing to its own func
Merge pull request #1222 from influxdb/parse-list

Parse list