Added support for pacaur,yaourt

lib/installer/managers/pacman.sh

@@ -1,7 +1,15 @@
 #!/bin/bash
 
 if [ -f "/etc/arch-release" ]; then
-	PackageManagerCLT="pacman"
+	#Last entry is the default package manager to use (pacman)
+	AurHelpers="pacaur yaourt pacman"
+	for AurHelper in $AurHelpers; do
+		if [ "`pacman -Qs $AurHelper`" ]; then
+			PackageManagerCLT=$AurHelper
+			break;
+		fi
+	done
+
 	PackageManagerCLTInstallOptions="-S"
 	PackageManagerCLTRemoveOptions="-Rs"