Start of engine changements

So I finally decided to actually start the engine changements. One of the first things I did (already a week or two ago) was to use the secure functions of strcpy etc. I'll never support anything else than windows so...

The memory manager has been made multithread safe.

And I started to write the scripting engine from scratch. I pulled out all the old Lua 4.0 stuff and started to rewrite it using Lua 5.1 and a nice header called Luna.h

Have fun...