@ohif/i18n: Fix issues with exports and update docs (#598)

* update i18n version -- already published

* update ohif/i18n version and add modules

* update ohif/i18n version

* update translating documentation

* replace addLocales method and exported modules

* lock files

* Update index.js

* fix(@ohif/i18n): export custom methods in the main i18n object

`initI18n`, `addLocales` and `T` are now being exported inside the main `i18n` object.

* remove unecessary dependencies

* update vtk-extension lock file

extensions/ohif-vtk-extension/package.json

@@ -20,7 +20,7 @@
     "lint": "eslint -c .eslintrc --fix src && prettier --single-quote --write src/**/*.{js,jsx,json,css}"
   },
   "peerDependencies": {
-    "@ohif/i18n": "0.1.0",
+    "@ohif/i18n": "0.1.1",
     "cornerstone-core": "^2.2.8",
     "cornerstone-wado-image-loader": "^2.2.3",
     "dcmjs": "^0.4.7",