PPRNG 1.15.0

Added DSi / 3DS support for French White 2, Italian White 2, Spanish
Black 2, and Spanish White 2.
Added DS / DS Lite support for Korean Black 2 and White 2, and DSi /
3DS support for Korean White 2.
Filtering on multiple Hidden Types is now possible in searches.
Fixed an issue where the Standard Seed Searcher could incorrectly
indicate a result had a swarm frame.
Fixed potential deadlock at the end of a search which could leave
around zombie threads.
Various bits of internal refactoring.