Removed tabs from build script.
Removed tabs from build script.

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