Tatoeba update (June 22nd, 2015)

** Tatoeba update (June 22nd, 2015) **

* Searches *
** Searches can now use wildcard characters to match parts of a word. **
** Stress marks can now be excluded from searches in Russian. **
** There is a new button for clearing the search field between searches **

* Other changes *
** Users can now choose the number of sentences to display on a page. **
** Private messages can now be permanently deleted. **
** The date format has been internationalized. **
** Adopting or unadopting a sentence no longer causes extra translations to be displayed. **