Move bg1npc.tp2 inside bg1npc directory

Move bg1npc.tp2 inside bg1npc directory
Packing TIS files

Created tispack-ed versions of x#ch12.tis and x#ch13.tis.  Adding
tisunpack binaries to distribution.  Edits to .tp2 file to use
HANDLE_TILESETS to unpack tiz files.
Removing unneeded charset conversion files

Charset handling updated to HANDLE_CHARSETS function.  So, old batch
and shell scripts no longer needed.
Integrating files for BGEE into correct phases

Moving .ITM and .WAV files added for BGEE compatibility to the relevant
“phase” subdirectories in BG1NPC structure.  This way, the files follow
the phases that use them rather than being lumped together in a BGEE
folder.