Added PKGBUILD for Arch users

PKGBUILD

@@ -0,0 +1,27 @@
+# Maintainer: Paul Black <paul@blackfamily.one>
+
+pkgname=si-edit-git
+pkgver=0.0.1
+pkgrel=1
+pkgdesc="Tools for working with SI files from LEGO Island."
+arch=('i686' 'x86_64')
+url="https://github.com/itsmattkc/SIEdit"
+license=('GPLv3')
+depends=('qt5-base' 'qt5-tools' 'qt5-multimedia' 'ffmpeg')
+makedepends=('git' 'make' 'cmake')
+source=('git+https://github.com/itsmattkc/SIEdit.git')
+md5sums=('SKIP')
+
+build() {
+        cd "$srcdir/SIEdit"
+        mkdir -p build
+        cd build
+        cmake ..
+        make
+}
+
+package() {
+        cd "$srcdir/SIEdit/build/app"
+        install -Dm755 si-edit "$pkgdir/usr/bin/si-edit"
+}
+