Added the Laravel 4 artisan completion plugin

plugins/laravel4/laravel4.plugin.zsh

@@ -0,0 +1,19 @@
+# Laravel 4: Artisan basic command completion
+
+_laravel4_get_command_list () {
+    php artisan | sed "1,/Available commands/d" | awk '/^  [a-z]+/ { print $1 }'
+}
+
+_laravel4 () {
+    if [ -f artisan ]; then
+        compadd `_laravel4_get_command_list`
+    fi
+}
+
+compdef _laravel4 php artisan
+compdef _laravel4 artisan
+
+#Alias
+alias artisan='php artisan'
+alias artisan2cl='php artisan cache:clear'
+alias artisan2routes='php artisan routes'