Complain about status code before content type.

GitHub currently returns 500 errors as HTML. When we encountered this, the
error message referred to the content type rather than the status code. Now we
check the status code first, so errors are more informative.

Signed-off-by: Felipe Coury <felipe.coury@gmail.com>

lib/octopi.rb

@@ -98,13 +98,13 @@ def submit(path, params = {}, format = "yaml", &block)
       end
       query = login ? { :login => login, :token => token } : {}
       resp = yield(path, query.merge(params), format)
+      raise APIError, 
+        "GitHub returned status #{resp.code}" unless resp.code.to_i == 200
       # FIXME: This fails for showing raw Git data because that call returns
       # text/html as the content type. This issue has been reported.
       ctype = resp.headers['content-type'].first
       raise FormatError, [ctype, format] unless 
         ctype.match(/^#{CONTENT_TYPE[format]};/)
-      raise APIError, 
-        "GitHub returned status #{resp.code}" unless resp.code.to_i == 200
       if format == 'yaml' && resp['error']
         raise APIError, resp['error'].first['error']
       end