removed unnecessary projects
added .travis.yml
refactor io packages
Updated README.md
added license.
refactor withJson method.
refactor value definitions.
refactor enum name.
Changed Charset type to sisioh's type
Update README.md
refactor log message.
added a html file for 404 Not Found.
added support RequestDumpFilter
added support toFuture method.
added support debug mode for RequestDumpFilter.
added recovery logic for config loading.
fixed header name.
fixed bug.
added filter as new package.
refactor imports & added application package.