internationalize

[dmalan]

[cmlsharp]

The infrastructure now exists, however, the translations still need to be done.

[cmlsharp]

To expand upon the above, these are the new instructions for adding translations:

0. mkdir check50/locale

1. First, ensure that babel is installed and that check50 is installed in development mode:

    pip install babel
    pip install -e .
   

2. Generate the translation template:

    python setup.py extract_messages
   

3. Generate the .po file for the desired language:

    python setup.py init_catalog -l <LANG>
   

   where <LANG> is the code of the language you want to translate (e.g., es for Spanish, en for English, etc.)

4. Then, add the translations to the newly created submit50/locale/<LANG>/LC_MESSAGES/submit50.po

5. Finally, compile the new translations:

    python setup.py compile_catalog
   

[cmlsharp]

Also, we'll want to have travis build the translations just lib50 does:
https://github.com/cs50/lib50/blob/6b94953569791f4ab6b896f8b3e2e42ef64a4edc/.travis.yml#L8

[dimasahmad]

Any update on this? I am interested to help translate check50 into Indonesian. If ok, I will start according to @crossroads1112 directions.