update translation

* based on rails/rails/guides/source/upgrading_ruby_on_rails.md@db924e1257
fix markup for jekyll
update with metaphrase
Merge branch 'no6v'
Merge branch 'yalab'
debug lesson2 for rails3.2
debug lesson1 for rails3.2
add post 2013-06-09-lesson3
add gems for twitter-bootstrap-rails
add post 2013-08-17-lesson4 and arounds
add provisional post lesson5
add provisional post git