standardize plugins, update metadata

add about-plugin metadata
chmod -x plugins
cleanup filenames to standardize on x.plugin.bash format
only plugin files intended to be executable from the command line should
contain a shebang line, and should be a+x.

plugins/available/nginx.plugin.bash

@@ -0,0 +1,63 @@
+cite about-plugin
+about-plugin manage your nginx service
+
+function nginx_reload() {
+  about reload your nginx config
+  group nginx
+
+  FILE="${NGINX_PATH}/logs/nginx.pid"
+  if [ -e $FILE ]; then
+    echo "Reloading NGINX..."
+    PID=`cat $NGINX_PATH/logs/nginx.pid`
+    sudo kill -HUP $PID
+  else
+    echo "Nginx pid file not found"
+    return 0
+  fi
+}
+
+function nginx_stop() {
+  about stop nginx
+  group nginx
+
+  FILE="${NGINX_PATH}/logs/nginx.pid"
+  if [ -e $FILE ]; then
+    echo "Stopping NGINX..."
+    PID=`cat $NGINX_PATH/logs/nginx.pid`
+    sudo kill -INT $PID
+  else
+    echo "Nginx pid file not found"
+    return 0
+  fi
+}
+
+function nginx_start() {
+  about start nginx
+  group nginx
+
+  FILE="${NGINX_PATH}/sbin/nginx"
+  if [ -e $FILE ]; then
+    echo "Starting NGINX..."
+    sudo $NGINX_PATH/sbin/nginx
+  else
+    echo "Couldn't start nginx"
+  fi
+}
+
+function nginx_restart() {
+  about restart nginx
+  group nginx
+
+  FILE="${NGINX_PATH}/logs/nginx.pid"
+  if [ -e $FILE ]; then
+    echo "Stopping NGINX..."
+    PID=`cat $NGINX_PATH/logs/nginx.pid`
+    sudo kill -INT $PID
+    sleep 1
+    echo "Starting NGINX..."
+    sudo $NGINX_PATH/sbin/nginx
+  else
+    echo "Nginx pid file not found"
+    return 0
+  fi
+}