0.4.9

- New parameters publicStatics, publicFolder , alwaysHostStatics,
maxLagPerRequest, disableLogger, and disableMultipart.
- New update checker for roosevelt CLI tool.
- New time limits for request processing (default one second). If time
expires, a 503 error will be served.
- Fix for broken CSS minification.
- Some refactoring.
- Improved documentation.