Change Rst ro RST

RST is abbreviation of reStructuredText.
Using Rst is plain wrong, it would be good to use RST or reStructuredText.

app/utils/status-image-formats.coffee

@@ -41,7 +41,7 @@ format = (version, slug, branch) ->
     when 'Textile' then textileStatusImage(url, slug, branch)
     when 'Rdoc' then rdocStatusImage(url, slug, branch)
     when 'AsciiDoc' then asciidocStatusImage(url, slug, branch)
-    when 'Rst' then rstStatusImage(url, slug, branch)
+    when 'RST' then rstStatusImage(url, slug, branch)
     when 'Pod' then podStatusImage(url, slug, branch)
     when 'CCTray' then ccxmlStatusUrl(slug, branch)
 

app/views/status-images.coffee

@@ -17,7 +17,7 @@ View = Ember.View.extend
     'Textile',
     'Rdoc',
     'AsciiDoc',
-    'Rst',
+    'RST',
     'Pod',
     'CCTray'
   ]