Merge pull request #9 from tt185581/teimo

add book detail page
Merge pull request #10 from tt185581/teimo

Teimo
Merge pull request #11 from tt185581/teimo

small model changes
Merge pull request #12 from tt185581/teimo

add favorite and must-have books
Merge pull request #13 from tt185581/teimo

Teimo
Merge pull request #14 from tt185581/teimo

add rspec gem
Merge pull request #15 from tt185581/teimo

Teimo
resolve conflict