Fixing bugs, prepending all names with context name

ast.cpp

@@ -107,10 +107,6 @@ struct Ast_Unary: Ast_Expr{
   U64 padding[2]; // For folding constants into atoms
 };
 
-struct Ast_Load: Ast{
-  String string;
-};
-
 struct Ast_Index: Ast_Expr{
   Ast_Expr *expr;
   Ast_Expr *index;