prepend string version of version with v for version

Author: samaaron

app/server/sonicpi/lib/sonicpi/spider.rb

@@ -304,7 +304,7 @@ def __load_buffer(id)
       id = id.to_s
       raise "Aborting load: file name is blank" if  id.empty?
       path = project_path + id + '.spi'
-      s = "# Welcome to Sonic Pi v#{@version.to_s}"
+      s = "# Welcome to Sonic Pi #{@version.to_s}"
       if File.exists? path
         s = IO.read(path)
       end

app/server/sonicpi/lib/sonicpi/version.rb

@@ -48,9 +48,9 @@ def to_s
         "#{@major}.#{@minor}.#{@patch}-#{@dev}"
       else
         if @patch == 0
-          "#{@major}.#{@minor}"
+          "v#{@major}.#{@minor}"
         else
-          "#{@major}.#{@minor}.#{@patch}"
+          "v#{@major}.#{@minor}.#{@patch}"
         end
       end
     end