update for three column tab seperated translation files
remove unused length property
Change translation file format

The new translation file format has three columns:
        <Article Title>\t<english label>\t<new label>

The first version of missingBot iterated over all articles
with missing Labels. With the new format the bot only iterates
over the articles in the first column.

new version: 1.1
update translation file format
add list_missing output example
ignore META-INF folder