add hint about getting windows memory on non-2.5 versions, refactor ConfigLine, make executable main
add hint about getting windows memory on non-2.5 versions, refactor ConfigLine, make executable main

gregs1104/pgtune,jhoblitt/pgtune,elitwin/pgtune,iterativo-git/pgtune,kmatt/pgtune,schmiddy/pgtune,makinacorpus/pgtune