Add overview.markdown for quick_start.
Merge branch 'feature/newdocs' of github.com:icattlecoder/docs.qiniu.com into feature/newdocs
Fixed bugs in concepts and programming model.
Merge branch 'feature/newdocs' of github.com:icattlecoder/docs.qiniu.com into feature/newdocs
Merge pull request #11 from SunLn/fix2

continue to fix bug
添加Move操作文档。
Merge pull request #12 from BluntBlade/feature/newdocs

Feature/newdocs
Rename folder.
Merge branch 'feature/newdocs' of github.com:icattlecoder/docs.qiniu.com into feature/fix_1
Emphasized the format of returnBody.
Add new markdown files.
Delete trial h2 titles.
Merge pull request #13 from hughlv/feature/fix_1

Feature/fix 1
Add api/rs/batch.markdown.
Add api/reference/security/access-token.markdown.
Merge pull request #14 from BluntBlade/feature/newdocs

Feature/newdocs
Add api/referece/security/download-token.markdown.
Add api/up/bput.markdown.
Add api/up/mkfile.markdown.
Merge pull request #15 from BluntBlade/feature/newdocs

Feature/newdocs