Tweak dependencies, and adjust PKGBUILD to adhere to the guidelines

PKGBUILD

@@ -1,32 +1,18 @@
-# Maintainer: codereader <greebo@angua.at>
+# Maintainer: codereader <greebo[AT]angua[DOT]at>
 pkgname=darkradiant
 pkgver=2.1.1
-pkgrel=0
+pkgrel=1
 epoch=
 pkgdesc="Level Editor for Doom 3 (idTech4) and The Dark Mod"
 arch=("x86_64")
 url="http://darkradiant.sourceforge.net/"
 license=('GPL')
-groups=()
-depends=("wxgtk>=3.0.0", "ftgl>=2.0.0", "glew>=1.0.0", "boost>=1.46.1", "boost-libs>=1.46.1", "freealut>=1.0.0", "webkitgtk2>=2.4.0")
-makedepends=("git>=2.0.0", "automake>=1.14", "libtool>=2.4.0", "gcc>=6.0.0")
-checkdepends=()
-optdepends=()
-provides=()
-conflicts=()
-replaces=()
-backup=()
-options=()
+depends=("wxgtk>=3.0.0", "ftgl>=2.0.0", "glew>=1.0.0", "boost-libs>=1.46.1", "freealut>=1.0.0", "libvorbis>=1.3.0", "python>=3.5.0", "libsigc++>=2.0.0")
+makedepends=("git>=2.0.0", "automake>=1.14", "libtool>=2.4.0", "gcc>=6.0.0", "boost>=1.46.1", "webkitgtk2>=2.4.0")
 install=
 changelog=
 source=("$pkgname-$pkgver::git+https://github.com/codereader/DarkRadiant.git")
-noextract=("tools", "debian")
 md5sums=("SKIP")
-validpgpkeys=()
-
-prepare() {
-	cd "$pkgname-$pkgver"
-}
 
 build() {
 	cd "$pkgname-$pkgver"