Update the RSS feed

[dpshelio]

Originally reported by: pohuigin (Bitbucket: pohuigin, GitHub: pohuigin)

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I think there is a lot more information we could put into the rss feed.

At the moment, from rss2:

1. what does 'flare index' mean on the RSS2 page?
2. which region is being referenced in the summary? e.g.,
   Region Statistics for Today
   Mount Wilson Class: bgd
   Area: 0110
   Nummber of Spots: 13
   Flares: C2.1 (00:59) C1.9 (10:10)
3. 'nummber of spots' is misspelled
4. include the forecasts!
5. other ideas...

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• Bitbucket: https://bitbucket.org/solarmonitor/solarmonitorphp/issue/9