Correction for the fix for Bug 3508 - Persistent storage support breaks Linux compatibility.
A 2nd `make install' will fail attempting to create symlink libnvmemmory.so already created by 1st install.
Install should pre-emptively delete it.
Demo/parser
Doc/libparser.tex
Lib/AST.py
Lib/symbol.py
Lib/token.py
Modules/parsermodule.c