fix to warn stats file missing on execution without --stats
v1.0.4
Add Query#invalid?
 * Norikra must check queries are invalid or not, in addition to Esper's check
  * Especially fields and schemas should be checked for Norikra
  * At first, "SELECT * FROM ..." are prohibited
allow CORS request
Merge pull request #46 from ixixi/feature/cors

Enable CORS
add --log4j-properties option for using external logger settings
change option name to --log4j-properties-path
Merge pull request #48 from nagaseyasuhito/master

add --log4j-properties option for using external logger settings
v1.0.5
update for v1.0.5
add favicon
Fix to parse JSON of request body, with string key, without symbol
 * symbolize_name was specified for api.rb handler simplicity
   * it is only for coding, without any external reason
 * @engine.send() receives events with String keys
   * To call send() with symbolized key events is explicitly BUG
v1.0.6
add v1.0.6 changes previously missed
Fix bug to guess chained access fields as non-optional fields on baseset generation
 * This causes bug that chained access fields are always required
 * That bug is issued on #51
v1.0.7
fix bug not to read command line threading options correctly
v1.0.8
add STDOUT() group to show output events in console, for debugging
fix to put query name to show where output event are from