made the pack completely portable and wrote relevent bat files to go with it

gitportable/mingw64/share/doc/git-doc/git-prune-packed.adoc

@@ -0,0 +1,47 @@
+git-prune-packed(1)
+===================
+
+NAME
+----
+git-prune-packed - Remove extra objects that are already in pack files
+
+
+SYNOPSIS
+--------
+[verse]
+'git prune-packed' [-n | --dry-run] [-q | --quiet]
+
+
+DESCRIPTION
+-----------
+This program searches the `$GIT_OBJECT_DIRECTORY` for all objects that currently
+exist in a pack file as well as in the independent object directories.
+
+All such extra objects are removed.
+
+A pack is a collection of objects, individually compressed, with delta
+compression applied, stored in a single file, with an associated index file.
+
+Packs are used to reduce the load on mirror systems, backup engines,
+disk storage, etc.
+
+
+OPTIONS
+-------
+-n::
+--dry-run::
+        Don't actually remove any objects, only show those that would have been
+        removed.
+
+-q::
+--quiet::
+	Squelch the progress indicator.
+
+SEE ALSO
+--------
+linkgit:git-pack-objects[1]
+linkgit:git-repack[1]
+
+GIT
+---
+Part of the linkgit:git[1] suite