Typo in README.md

'htmlbeautify' > 'htmlbeautifier'
Merge pull request #45 from mendi/master

Typo in README.md
Remove shift for private/protected/public.
Merge pull request #46 from hongliang-goudou/master

Remove shift for private/protected/public.
Merge branch 'master' of https://github.com/CraigWilliams/BeautifyRuby into indention_of_private