Add passthru delegate and avconv support.
Add padding to rational thumbs.
Refactoring PHP init code.
Update zh-cn.json
Refactoring.
More refactorings.
More refactorings.
More refactorings.
More refactorings.
Remove PHP closing tags.
More refactorings.
More refactorings.
More refactorings.
Add CHANGELOG.md.
Update JS libs.
Update H5BP.
Remove timers for now.
Merge pull request #281 from orzFly/develop

Update zh-cn.json
Update some l10n files.
Add folder deletion.