Added README files to explain the localization process

Localizations/README.md

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+# Localization flow
+
+The localization is handled via [Transifex](https://transifex.com/duplicati) and all text work should go through Transifex.
+
+Please do not modify the `.po`/`.mo` files found here.
+
+# Updating Transifex strings
+
+When the codebase changes, the strings can be extracted and sent to Transifex by running:
+
+```bash
+./extract_all.sh
+./push_source_files_to_transifex.sh
+```
+
+This will update all information in Transifex and let translators know what has changed and what is missing.
+Note that this is a messy process that will cause line-ending changes in most files, so it is best done when there are no pending git changes on the local copy.
+
+After running the process, simply discard the changes.
+
+# Updating the .mo/.po files
+
+When new work has been performed in Transifex, this can be pulled and applied to the source:
+
+```bash
+./pull_from_transifex.sh
+./compile_all.sh
+```
+
+This will change the local files have the new changes.
+After inspecting the changes, this can be used to make a PR with updates.

Localizations/duplicati/README.md

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+# Autogenerated files!
+
+Please do not modify these files as they are autogenerated.
+See the [Localization README](../README.md) for details.

Localizations/webroot/README.md

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+# Autogenerated files!
+
+Please do not modify these files as they are autogenerated.
+See the [Localization README](../README.md) for details.