select a word to external programs and trace it

I suggest you to add a link to various external programs. Example of functionnalities :
- pronounce the word with swac-play
- get the traduction into native language with stardict

If you add the select word in a log, it become easy to get the list of word (about it I researched the translation), and fetch it in a vocabulary entertainment, like anki or parley.

Thanks for this good job, well done ! :-)