Fixed some bugs in "System, settings". Fixes #174.
Fixes #176.
Updated .gitignore.
Added DataSet. Added Google Docs app. Improved files openers management.
Fixes some bugs in Google Drive API. Added "Import in Google Drive" feature in Google Docs app.
Adds "Import in Google Docs" feature to Google Docs app.
Create CHANGELOG.md
Improved doc in Webos.Callback.

Translated and completed comments.
Added comments to Webos.Collection.
Added comments
Added comments to Webos.Error.
Added some comments to Webos.File.
Added JSDoc to Webos.File.
Added JSDoc to Webos.inherit().
Update file.js
Improved JSDoc in Webos.File.
Added JSDoc to Webos.Model.
Added JSDoc to Webos.Observable.
Added JSDoc to Webos.Process.
Added JSDoc to /boot/lib/script.js.