Merge pull request #117 from hlee/master

refact name for rspec
Merge pull request #118 from hlee/master

rspec for helper
Fixed #116
Merge pull request #121 from hlee/master

integration test
Fixed #116, #119
modify viewed_count
Merge pull request #122 from caok/master

modify viewed_count
role with factory_girl
Merge branch 'master'
Merge pull request #123 from caok/master

role with factory_girl
refact the question spec