Log Message:
Update ruby-roo to 2.3.2.

## [2.3.2] 2016-02-18
### Fixed
- Handle url with long query params (ex. S3 secure url) \ 
[302](https://github.com/roo-rb/roo/pull/302)
- Allow streaming for Roo::CSV [297](https://github.com/roo-rb/roo/pull/297)
- Export Fixnums to Added csv [295](https://github.com/roo-rb/roo/pull/295)
- Removed various Ruby warnings [289](https://github.com/roo-rb/roo/pull/289)
- Fix incorrect example result in Readme.md \ 
[293](https://github.com/roo-rb/roo/pull/293)