Small update to engine

Hello folks,

i’ve updated the engine to version 8709.
Removed the [character] functionality in filenames and replaced it with a simpler piece of code.
In a filename like ~/rendercharacter.lgs will mean data/characters/currentcharacter/rendercharacter.lgs.

So ~ means ” Current character folder ”
In addition, . means ” Current folder ” so for data/moves/1.xml . will mean “data/moves”