Configure file, partial 64-bit support

Thanks to @redsaurus we've now got (partial) 64-bit support. The game and sounds dll now compile under x64.

I've also added a simple python configure script (based off of Arancaytar's cburschka/cadence script) to quickly allow changing compilers.
Gone are the days of three different Makefiles!

.gitignore

@@ -2,10 +2,12 @@
 *.slo
 *.lo
 *.o
+*.res
 
 # Compiled Dynamic libraries
 *.so
 *.dylib
+*.dll
 
 # Compiled Static libraries
 *.lai
@@ -22,4 +24,6 @@ Win32/*/bin
 Win32/*/obj
 *.layout
 *.depend
-*blades.ini
+*blades.ini
+
+.config.vars