[poppler] Poppler 0.15.2 (0.16 Beta 2) released

[Albert Astals Cid]

BTW here comes the updated release schedule

 * Nov 29 (+2 weeks) Poppler 0.15.3 (0.16 RC)
 * Dec 27 (+4 weeks) Poppler 0.16.0

We are in bugfixing mode in trunk until we release Poppler 0.16.0

Albert