Build system improvements

- added 'make run' rule to help with testing
- preserved pasmo exit code on Win32 assembly failure
- fixed Win32 clean rule so it removes all files cleanly
- easier to change target basename

make.bat

@@ -1,13 +1,17 @@
 @echo off
+setlocal
+set NAME=pacemuzx
 
 if "%1"=="clean" goto clean
 
 png2bin.pl tiles.png 6
 png2bin.pl sprites.png 12
 
-pasmo --tap pacemuzx.asm pacemuzx.o pacemuzx.sym
+pasmo --tap %NAME%.asm %NAME%.o %NAME%.sym
+if errorlevel 1 goto end
 
-copy /b loader.tap+pacemuzx.o pacemuzx.tap
+copy /b loader.tap+%NAME%.o %NAME%.tap
+if "%1"=="run" start %NAME%.tap
 
 if not "%1"=="dist" goto end
 
@@ -21,9 +25,11 @@ move end.part dist\
 goto end
 
 :clean
-if exist pacemuzx.tap del pacemuzx.tap pacemuzx.sym pacemuzx.o
+if exist %NAME%.tap del %NAME%.tap %NAME%.sym %NAME%.o
 if exist tiles.bin del tiles.bin sprites.bin
-if exist dist\ del dist\Makefile dist\make.bat dist\start.part dist\end.part dist\pacemuzx.tap
+if exist dist\ del dist\ReadMe.txt dist\Makefile dist\make.bat dist\start.part dist\end.part
+if exist dist\%NAME%.tap del dist\%NAME%.tap
 if exist dist\ rmdir dist
 
 :end
+endlocal