Create unified batch file for running the game from the source directory on Windows and update README.md

start.bat

@@ -0,0 +1,7 @@
+@echo OFF
+
+rem This solution of detecting the current CPU taken from here: https://stackoverflow.com/a/24590583
+reg Query "HKLM\Hardware\Description\System\CentralProcessor\0" | find /i "x86" > NUL && set CURRENT_CPU=32BIT || set CURRENT_CPU=64BIT
+
+if %CURRENT_CPU%==32BIT .\dist\win32\love.exe .
+if %CURRENT_CPU%==64BIT .\dist\windows\love.exe .