Adds support for texture path substition for newer texture block types.
Updated spell texture info dump for BSTextureSet Blocks; contributed by
Morcroft.
Updated Authors with new previous developer section and added Morcroft
to contributors
Reworked texture path to decode bytes and print out only strings with
actual values.
Merge pull request #4 from neomonkeus/feature/skyrim_texturepath_replace

Update : Spell texture path substitute & dump improve