New translations from transifex

OpenKeychain/src/main/res/raw-pt-rBR/help_about.md

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 [https://www.openkeychain.org](https://www.openkeychain.org)
 
-[OpenKeychain](https://www.openkeychain.org) is an OpenPGP implementation for Android.
+[OpenKeychain](https://www.openkeychain.org) é uma implementação OpenPGP para Android.
 
-License: GPLv3+
+Licença: GPLv3+
 
-[//]: # (NOTE: Alphabetic ordering)
+[//]: # (NOTA: Ordem alfabética)
 
-## Main Developers
-  * Dominik Schürmann (Maintainer)
+## Desenvolvedores principais
+  * Dominik Schürmann (Mantenedor)
   * Vincent Breitmoser
 
-## Top Contributors
+## Principais Colaboradores
   * Adithya Abraham Philip
   * Ash Hughes
   * 'mar-v-in'
-  * 'Thialfihar' (APG developer)
+  * 'Thialfihar' (APG desenvolvedor)
   * Tim Bray
 
-## Occasional Contributors
+## Colaboradores Ocasionais
   * Art O Cathain
   * Brian C. Barnes
   * Bahtiar 'kalkin' Gadimov
@@ -51,9 +51,9 @@ License: GPLv3+
   * Sreeram Boyapati
   * 'steelman'
 
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+[//]: # (NOTA: Ordem alfabética)
 
-## Libraries
+## Bicliotecas
   * [Android Support Libraries](http://developer.android.com/tools/support-library/index.html) (Apache License v2)
   * [FloatingActionButton](https://github.com/futuresimple/android-floating-action-button) (Apache License v2)
   * [HtmlTextView](https://github.com/sufficientlysecure/html-textview) (Apache License v2)