Added MreIdle
Added MreInfo
Added MreIngr
Added MreKeym
Added MreLand

This was taken from FNV and partially updated.  It may or may not really
cause performance issues it is untested.  However, it would definitely
need to handle the fact that BTXT is sometimes by itself or ATXT and
VTXT are together.
Added MreLigh
Added MreLscr
Added MreLtex