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

gitportable/usr/share/vim/vim91/ftplugin/xs.vim

@@ -0,0 +1,15 @@
+" Vim filetype plugin file
+" Language:      XS (Perl extension interface language)
+" Maintainer:    vim-perl <vim-perl@googlegroups.com>
+" Homepage:      https://github.com/vim-perl/vim-perl
+" Bugs/requests: https://github.com/vim-perl/vim-perl/issues
+" License:       Vim License (see :help license)
+" Last Change:   2018 Mar 28
+
+" Only do this when not done yet for this buffer
+if exists("b:did_ftplugin")
+    finish
+endif
+
+" Just use the C plugin for now.
+runtime! ftplugin/c.vim ftplugin/c_*.vim ftplugin/c/*.vim