Fixes documentation website links

Tools/TGS3Build.ps1

@@ -24,6 +24,10 @@ if($publish_dox){
 	git config user.name "Appveyor CI"
 	git config user.email "ci@appveyor.com"
 	echo '# THIS BRANCH IS AUTO GENERATED BY APPVEYOR CI. SEE Tools/TGS3Build.ps1 ON MASTER' > README.md
+	
+	# Need to create a .nojekyll file to allow filenames starting with an underscore
+	# to be seen on the gh-pages site. Therefore creating an empty .nojekyll file.
+	echo "" > .nojekyll
 	git add --all
 	git commit -m "Deploy code docs to GitHub Pages for Appveyor build $Env:APPVEYOR_BUILD_NUMBER" -m "Commit: $Env:APPVEYOR_REPO_COMMIT"
     git push -f "https://$Env:repo_token@$github_url" 2>&1 | out-null