add carrierwave-qiniu
add carrierwave to gitignore
add qiniu-rs
for resource file nil error
Merge branch 'master' of https://github.com/bay6/books-share into bay6

Conflicts:
	app/models/resource.rb
Merge pull request #98 from caok/bay6

add send to kindle
Merge branch 'master' into bay6
Merge pull request #99 from caok/bay6

add delayed_jobs for sending_to_kindle
add book download and 3 type book
基本完成首页样式调整
update db/schema
Merge pull request #18 from bay6/issue_1

Issue 123  完成首页第一次调整。