I-need-an-image

Changes:
- Add timeout when waiting requests.
- Add decorators to retry requests.

**Full Changelog**: https://github.com/RyouMon/i-need-an-image/compare/v0.1.1...v0.1.2

Changes:
- Refactor BingImages.
- Retry when download failed.
- Cache page for same keyword.

**Full Changelog**: https://github.com/RyouMon/i-need-an-image/compare/v0.1.0...v0.1.1

First version for i-need-an-image.