New: Format Update, b245

[par]

Please update your templates and scripts.

1. Several new parameters are added to the format
-feels-like temperature
-uv - ultra violet index
-solar - solar activity

See XML format documentation for the details.
http://yowindow.com/forum/viewtopic.php?f=11&t=368

2. I have added unit attribute to most of parameters.
So now every parameter can be provided in metric or imperial units.
At least I hope so.

Pay attention that the current temperature is now to be passed with <current> tag.

Hope you like the changes.