#21 perl is hard coded in the gits script

[Jose Santiago]

Scripts should perl from the PATH and not hard code a path to perl in the script. The attached patch fixes that issue.

[Joel Purra]

Applied the patch in this gitslave fork:
https://github.com/joelpurra/gitslave/commit/f68927c89d564d0a02ef2a28f09ac22b96ba8994
https://github.com/joelpurra/gitslave

Thanks!