setup.py: Add awlsim-win32.bat to scripts

Signed-off-by: Michael Buesch <m@bues.ch>
Rename awlsim-win32.bat to awlsim-win.bat

Signed-off-by: Michael Buesch <m@bues.ch>
Add dist directory to .gitignore

Signed-off-by: Michael Buesch <m@bues.ch>