#3 head and tail commands need to modified

[Asher Schaffer]

the head and tail commands in install.sh should be head
-n and tail -n

using head and tail without -n will be removed, in tail
ver 5.2.1 it appears to be already removed.

<snip>
.... Installing
/var/www/localhost/htdocs/mythweb/themes/Default/mythstreamtv_createfile.php:
Success
.... Checking MythWeb Installation: Required -
Installing...
........ Fixing up themes/default/theme.php: head:
`-157' option is obsolete; use `-n 157' since this will
be removed in the future
tail: cannot open `+158' for reading: No such file or
directory
Failed