Magic Encoding Warning suppress / Use newest Flog#process_iter method

I was running into issues with the ruby_parser warning - "Skipping magic encoding comment" every time I saved a file - The comment had an extra '\n' that was causing Vim to redraw the screen in odd ways - This pull request overwrites the original method but only by commenting out the warning.  

I also pulled out the overwritten Flog#process_iter method and allowed the plugin to use the original from the newest Flog gem - This solved the issues I was getting while loading spec files.