Update to PKGBUILD, and comp script

PKGBUILD

@@ -6,8 +6,8 @@ pkgdesc="Simple folder compression with pv and pigz"
 arch=('any')
 license=('MIT')
 deps=('tar' 'pv' 'pigz')
-source=('comp')
-mdsums=('SKIP')
+source=('comp.sh')
+md5sums=('SKIP')
 
 package() {
     install -Dm755 "$srcdir/comp.sh" "$pkgdir/usr/bin/comp"