updated vscodeignore to ignore preview jedi files

Author: DonJayamanne

.vscodeignore

@@ -12,4 +12,8 @@ pythonFiles/**/*.pyc
 vsc-extension-quickstart.md
 .travis.yml
 requirements.txt
-webpack.config.js
+webpack.config.js
+pythonFiles/preview/jedi/docs/**
+pythonFiles/preview/jedi/scripts/**
+pythonFiles/preview/jedi/test/**
+pythonFiles/preview/jedi/*.*