Version 0.15.3
* New underline formatting add-in (disabled by default) from Mark Wakim.
* Add ctrl +/- shortcuts for changing font size (#488822, Stefan Schweizer).
* Fix bullet display in HTML export (#422954, Stefan Schweizer).
* Update WebSync to use OAuth for authentication, and use the latest REST API.
* Fix i18n issue in WebSync (Anders Petersson).
* Add "Get More Add-Ins..." link in the Add-Ins tab of Preferences.
* Reduce command line output when not running Tomboy with --debug.
* Fix tarball for those that need panelapplet-sharp bundled.
* Documentation updates (Paul Culter).
* New Translations: vi
* Translation updates: bn_IN, es, et, he, sv, ta, th, uk, zh_CN