Fetch language-specific info from Sigarra

[bdmendes]

Such as course units info.

[bdmendes]

Change the SessionDependentFetcher to depend on the available locales (and know what to do according to the current selected one). You can use the Portuguese parser if the english HTML is different.

[thePeras]

The HTML of Calendar Page is different in the both versions (en/pt). Can be hard handle this case