uvmeter: new plugin showing UV data (Australia)

This patch adds a new optional plugin showing UV data for Australian
users. The data is aquired by simple HTTP request from the Australian
Radiation Protection and Nuclear Safety Agencies XML data feed.

The uvmeter plugin can be configured ovserving multiple different
station across the country. The alias now defaults to 'uv <stationid>'.

1 files changed, 17 insertions, 0 deletions

diff --git a/readme.md b/readme.md
index 7ecea56..7f1be52 100644
--- a/readme.md
+++ b/readme.md
@@ -157,6 +157,9 @@ Otherwise, you'll need to install them yourself.
 :    Support for xpm image file format. This will allow loading .xpm files in `<icon>`.
      Requires the [libXpm] C library.
 
+`with_uvmeter`
+:    Enables UVMeter plugin. The plugin shows UV data for Australia.
+
 `all_extensions`
 :    Enables all the extensions above.
 
@@ -1243,6 +1246,20 @@ more than one battery.
 
     Run CatInt 0 "/sys/devices/platform/thinkpad_hwmon/fan1_input" [] 50
 
+### `UVMeter`
+
+- Aliases to "uv " + station id. For example: `%uv brisbane%` or `%uv
+  alice springs%`
+- Args: default monitor arguments.
+
+- *Reminder:* Keep the refresh rate high, to avoid making unnecessary
+  requests every time the plug-in is run.
+- Station IDs can be found here:
+  http://www.arpansa.gov.au/uvindex/realtime/xml/uvvalues.xml
+- Example:
+
+        Run UVMeter "brisbane" ["-H", "3", "-L", "3", "--low", "green", "--high", "red"] 900
+
 ## Executing External Commands
 
 In order to execute an external command you can either write the