Add Transifex integration and documentation for translations

.tx/config

@@ -0,0 +1,10 @@
+[main]
+host = https://www.transifex.com
+
+[terminator.po-terminator-pot--master]
+file_filter = po/<lang>.po
+minimum_perc = 0
+source_file = po/terminator.pot
+source_lang = en
+type = PO
+

README.md

@@ -65,7 +65,8 @@ Any help is welcome with the Terminator project.
 
 * [Open issues for bugs or enhancements](https://github.com/gnome-terminator/terminator/issues/new)
 * [Join our chat room on gitter.im for general questions](https://gitter.im/gnome-terminator/community)
-*
+* [Help translating Terminator](TRANSLATION.md)
+
 You can find old bugs and questions in the launchpad project, but please don't post anything new there.
 
 * https://answers.launchpad.net/terminator

RELEASE.md

@@ -26,6 +26,12 @@ dos2unix CHANGELOG.md
 
 Check and review CHANGELOG.md for the expected result.
 
+## Review and update translations
+
+Check for open pull-requests by Transifex or pull the files manually.
+
+See [TRANSLATION](TRANSLATION.md).
+
 ## Update AUTHORS
 
 This will make sure we mention everyone that has contributed to Terminator.

TRANSLATION.md

@@ -0,0 +1,52 @@
+# Translation
+
+Terminator has been translated to multiple languages and locales, but there is always
+work to do, so everyone is welcome to help and contribute.
+
+You can find all translations under the `po` directory, which will be compiled and
+installed with Terminator.
+
+Translations are managed on Transifex [transifex.com/terminator],
+anyone is free to join the project and start translating.
+
+You should read the [Getting Started as a Translator] guide.
+
+_Questions or problems?_ Please reach out on [Gitter] or [open an issue].
+
+## Updating POT
+
+The POT file is the template for all translations and is generated from the Python
+source code.
+
+    cd po/
+    ./genpot.sh
+    git diff terminator.pot
+
+To generate and handle POT and PO files, you will need at least `gettext` and `intltool` installed.
+
+Usually the POT file is automatically synced to Transifex, but it can be manually pushed:
+
+    tx push --source
+
+## Updating Translations
+
+Transifex is configured to automatically open a pull-request when a language has been
+fully translated. A manual update is always possible and might be useful when preparing
+a release.
+
+    tx pull --all
+
+You can also push translations changed outside of Transifex back to the service:
+
+    tx push --translations --language XX
+
+## External Documentation
+
+* [Getting Started as a Translator]
+* [Transifex CLI Client](https://docs.transifex.com/client/introduction)
+* [Documentation Overview](https://docs.transifex.com/)
+
+[Gitter]: https://gitter.im/gnome-terminator/community
+[open an issue]: https://github.com/gnome-terminator/terminator/issues/new/choose
+[transifex.com/terminator]: https://www.transifex.com/terminator/terminator/dashboard/
+[Getting Started as a Translator]: https://docs.transifex.com/getting-started-1/translators