robots.txt.  - Added rule for not indexing sentences/with_audio. - Removed the rules with /users, and replaced them by "Disallow: */users/*"
robots.txt. 
- Added rule for not indexing sentences/with_audio.
- Removed the rules with /users, and replaced them by "Disallow: */users/*"

shashank19gaurav/tatoeba2,Tatoeba/tatoeba2,shashank19gaurav/tatoeba2,Tatoeba/tatoeba2,shashank19gaurav/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,shashank19gaurav/tatoeba2,Tatoeba/tatoeba2