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

gitportable/mingw64/share/doc/git-doc/git-init-db.adoc

@@ -0,0 +1,23 @@
+git-init-db(1)
+==============
+
+NAME
+----
+git-init-db - Creates an empty Git repository
+
+
+SYNOPSIS
+--------
+[verse]
+'git init-db' [-q | --quiet] [--bare] [--template=<template-directory>] [--separate-git-dir <git-dir>] [--shared[=<permissions>]]
+
+
+DESCRIPTION
+-----------
+
+This is a synonym for linkgit:git-init[1].  Please refer to the
+documentation of that command.
+
+GIT
+---
+Part of the linkgit:git[1] suite