Update .gitignore

It had been long ignored, now it's cleaned up.

Author: andyleejordan

.gitignore

@@ -1,17 +1,11 @@
-bin/
-examples/Release/
-examples/Tests/foo*.txt
-out/
-node_modules/
+.vscode-test/
 logs/
-modules/*
-sessions/*
-!modules/README.md
-vscode-powershell.zip
-vscps-preview.zip
+modules/
+node_modules/
+out/
+sessions/
+test/.vscode/
+
+test-results.xml
 *.vsix
-npm-debug.log
-.vscode-test/
 *.DS_Store
-test-results.xml
-test/.vscode/settings.json