moved some texture compression fns to Helper.cpp
moved some texture compression fns to Helper.cpp

seanisom/vtp,nakijun/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp,markraz/vtp,markraz/vtp