Modify extraction method

Pybabel has trouble extracting from JSX files (see here
python-babel/babel#280). So we
decided to do extraction by compiling components into js
just for the extraction process and then using pybabel's js
config setting to get the translations.

babel.cfg

@@ -1,4 +1,4 @@
-[javascript:**.jsx]
+[javascript:**.js]
 encoding = utf-8
 [jinja2: **/templates/**.html]
-extensions=jinja2.ext.autoescape,jinja2.ext.with_
+extensions=jinja2.ext.autoescape,jinja2.ext.with_

package.json

@@ -3,6 +3,7 @@
   "version": "0.0.1",
   "description": "beavy frontend",
   "scripts": {
+    "prepare-i18n": "./node_modules/babel-cli/bin/babel.js --out-dir beavy beavy && ./node_modules/babel-cli/bin/babel.js --out-dir beavy_modules beavy_modules && ./node_modules/babel-cli/bin/babel.js --out-dir beavy_apps beavy_apps",
     "style-check": "eslint beavy/jsbeavy/**/**.jsx beavy_modules/**/**.jsx beavy_apps/**/**.jsx .infrastructure/**/*.js",
     "style-fix": "eslint --fix beavy/jsbeavy/**/**.jsx beavy_modules/**/**.jsx beavy_apps/**/**.jsx .infrastructure/**/**.js",
     "test": "jest --coverage jsbeavy beavy_modules/ beavy_apps",