Generating partial files

Hi,

i´m using the angular-translate partialLoader for my project with the following file structure:

```
i18n
-- de
-- -- app.json
-- -- global.json
-- en
-- -- app.json
-- -- global.json
```

In my code the placeholder have the following naming:
`{{ 'app.title' | translate }}` or `{{ 'global.sitename' | translate }}`

I put all keys with the first notation in the representing json files, e.g. app.title is a translation entry of the file app.json:

**en:**
**app.json**

```
{
"app": {
"title": "My title",
"subname": "another translation"
}
}
```

**global.json**

```
{
"global": {
"sitename": "My sitename"
}
}
```

**de:**
**app.json**

```
{
"app": {
"title": "Mein Titel",
"subname": "eine weitere Übersetzung"
}
}
```

**global.json**

```
{
"global": {
"sitename": "Mein Seitenname"
}
}
```

And now the question: Is it possible with grunt-angular-translate to extract the first key of the naming, e.g. **app**.title.[...] and write (or update) the translation in the corresponding file (here **app**.json)? If there is no file with this name, create it. How is it possible?