Add ability to set hotspot target's pitch and yaw.
Add ability to set hotspot target's pitch and yaw.

quentinyang/pannellum,Benvii/pannellum,eric-seekas/pannellum,riuson/pannellum,mpetroff/pannellum,riuson/pannellum,psteph801/psteph801.github.io,quentinyang/pannellum,quentinyang/pannellum,ywjrg/pannellum,eric-seekas/pannellum,riuson/pannellum,mpetroff/pannellum,Benvii/pannellum,psteph801/psteph801.github.io,Benvii/pannellum,eric-seekas/pannellum,psteph801/psteph801.github.io,ywjrg/pannellum,Benvii/pannellum,mpetroff/pannellum,quentinyang/pannellum,mpetroff/pannellum,riuson/pannellum,eric-seekas/pannellum,psteph801/psteph801.github.io,ywjrg/pannellum,ywjrg/pannellum