* Improved ExampleGenerator:
- Now takes into account enum and uri/url formats for strings.
- Uses example for referenced objects if available.
- Proper examples get generated for specific numeric formats, because more specific formats now get checked before generic format.
- Honors min and max values for numerical properties, if set.
* Ran script `bin/nodejs-petstore-server.sh`.
* Renamed log to logger to conform to coding standard.