Multi-words and terms upload

This release fixes an important bug preventing multi-words insertion for languages using spaces. You do no longer need to enable local_infile to use the terms import utility.

Changed

• Refactored upload_words.php.

Fixed

• Multi-words insertion for languages using no space is now repaired! Thanks to @gaoxiangluke for signaling it (#38).
• Terms import (upload_words.php) can now be used with @@GLOBAL.local_infile (MySQL) set to 0, definitely closing #20.
• Deleted a parasite ";" that was displayed after importing terms.