feat: i18n (#706)

Basically done. The locales are on `src/locales`. @lidel would you help me by setting up Transifex for IPFS Desktop? 😄 

closes #650

.tx/config

@@ -0,0 +1,11 @@
+[main]
+host = https://www.transifex.com
+lang_map = zh_CN: zh-CN, zh_HK: zh-HK, zh_TW: zh-TW, ko_KR: ko-KR
+
+[ipfs-desktop.ipfs-desktop-json]
+file_filter = src/locales/<lang>.json
+minimum_perc = 95
+source_file = src/locales/en.json
+source_lang = en
+type = KEYVALUEJSON
+

README.md

@@ -19,6 +19,7 @@ IPFS Desktop allows you to run your IPFS Node on your machine without having to
 
 - [Install](#install)
 - [Contribute](#contribute)
+    - [Translations](#translations)
 
 ## Install
 
@@ -40,12 +41,19 @@ npm start
 
 The IPFS Desktop app will launch and should appear in your OS menu bar.
 
+## Translations
+
+The translations are stored on [./src/locales](./src/locales) and the English version is the source of truth.
+Other languages are periodically pulled from [Transifex](https://www.transifex.com/ipfs/ipfs-desktop/), a web interface to help us translate IPFS Desktop and its components to another languages.
+
 ## Contribute
 
-[![](https://cdn.rawgit.com/jbenet/contribute-ipfs-gif/master/img/contribute.gif)](https://github.com/ipfs/community/blob/master/contributing.md)
+[![](https://cdn.rawgit.com/jbenet/contribute-ipfs-gif/master/img/contribute.gif)](https://github.com/ipfs/community/#contributing-guidelines)
 
 Feel free to join in. All welcome. Open an [issue](https://github.com/ipfs-shipyard/ipfs-desktop/issues)!
 
+If you're interested in contributing translations, go to [project page on Transifex](https://www.transifex.com/ipfs/ipfs-desktop/translate/), create an account, pick a language and start translating.
+
 This repository falls under the IPFS [Code of Conduct](https://github.com/ipfs/community/blob/master/code-of-conduct.md).
 
 ## License

package.json

@@ -86,11 +86,16 @@
     "filesize": "^3.6.1",
     "fs-extra": "^7.0.1",
     "go-ipfs-dep": "^0.4.18",
+    "i18next": "^12.1.0",
+    "i18next-electron-language-detector": "0.0.10",
+    "i18next-icu": "^0.6.0",
+    "i18next-node-fs-backend": "^2.1.0",
     "ipfs-css": "^0.12.0",
     "ipfsd-ctl": "^0.40.0",
     "is-ipfs": "^0.4.7",
     "react": "^16.6.3",
     "react-dom": "^16.6.3",
+    "react-i18next": "^8.3.8",
     "redux-bundler": "^22.2.0",
     "redux-bundler-react": "^1.1.0",
     "tachyons": "^4.11.1",