Add script to look up postgres sql statements
user
```coffeescript
# Description:
#   Strip help information from the Postgres web documentation.
#   Example: hubot pgsql 9.0 select
#
# Dependencies:
#   None
#
# Configuration:
#   None
#
# Commands:
#   hubot pgsql <version> <sql>
#
# Author:
#   mwongatemma

module.exports = (robot) ->
  robot.respond /pgsql\s+(\d.\d)?\s+(.+)$/i, (msg) ->
    ver = msg.match[1]
    sql = msg.match[2].toLowerCase()

    sql = sql.replace /[\s]/g, ''

    url = 'http://www.postgresql.org/docs/' + ver + '/static/sql-' + sql + '.html'
    msg.http(url)
      .get() (err, res, body) ->
        start = body.indexOf '<h2>Synopsis</h2>'
        start = body.indexOf '\n', start
        start = body.indexOf '\n', start
        end = body.indexOf '</pre>', start
        synopsis = body.substr start + 1, end - start - 2
        msg.send synopsis.replace /<[\s\S]+?>/g, ''
```
assistant