Finished refactoring build process, Added final GUID to MSI, Finished separating build scripts

Update .gitignore, check-and-fix-path.bat, and 9 more files...

NibblePoker.Packaging.ListComPort/Scripts/make-msi.bat

@@ -4,22 +4,24 @@
 pushd %~dp0
 cd /D "%~dp0"
 
-:: Calling the common script
+:: Calling the common script.
 call .\commons.bat
 
 :: Moving to the "NibblePoker.Packaging.ListComPort\Wix" folder.
 cd .\..\Wix
 
-:: Cleaning
+:: Cleaning.
 echo Removing old MSI-related files...
 del *.msi >nul 2>&1
 del *.wixobj >nul 2>&1
 del *.wixpdb >nul 2>&1
 echo.
 
-:: Packaging into MSI
+:: Packaging into MSI.
 echo Creating x64 MSI package...
 set WixTargetPlatform=x64
+set NP_MSI_OK=false
+
 candle -nologo ListComPort.wxs -out ListComPort_x64.wixobj -ext WixUIExtension
 if ERRORLEVEL 1 (
 	echo.
@@ -52,5 +54,9 @@ if ERRORLEVEL 1 (
 	goto end-msi-error
 )
 
-:: Going back to the original directory
+set NP_MSI_OK=true
+
+
+:end-msi-error
+:: Going back to the original directory.
 popd