Update .gitignore

Added a license header

Author: emmac-cerebras

.gitignore

@@ -1,3 +1,5 @@
+# Apache license 2 - modified after the fork to add VS code 
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
@@ -166,4 +168,4 @@ cython_debug/
 **/.DS_Store
 
 # VS Code
-.vscode/
+.vscode/