v0.38b - Minor Update [GA_Texture_bug + WallBug]

In this minor update, I fixed the GA missing texture bug by modifying
folder structure a bit.

I also implemented a protection to avoid open-aired dungeon. It picks
randoms room/outside position and try to find a path between both. If
there is a path, it means dungeon has a missing wall.

This features hasn't been fully tested and need further test.