Merge pull request #54 from hlee/master

revert the likeable approach
Fixed #53
Merge pull request #56 from hlee/master

basic function of the follow
Fixed #55
Merge pull request #58 from hlee/master

like unlike of i18n
Fixed #57
remove search_controller
Merge pull request #60 from hlee/master

rspec of like unlike
Fixed #59
Fixed #52
Merge branch 'master' of git://github.com/bay6/books-share
add the show of user
add pretty url by friendly_id
add user in show of book
Merge pull request #61 from caok/master

pretty url and user's show
remove pry from spec
Merge pull request #62 from caok/master

fix the error in travis ci