Bug fixes, Spanish Translations

Server

f7a42cd Fixed a crash in Store due to a bug in the mysql adapter when missing auth record.
77c524b b0e2b17 Spanish translations for email templates (thanks @rkgarcia)

Android

Bug fixes: https://github.com/tinode/tindroid/releases/tag/v0.17.9

iOS

Bug fixes, Russian translation: https://github.com/tinode/ios/releases/tag/v1.7.9

WebApp

Bug fixes: https://github.com/tinode/webapp/releases/tag/v0.17.9

JS SDK

Bug fixes: https://github.com/tinode/tinode-js/releases/tag/v0.17.9