为avconcat的说明添加链接。
Merge branch 'master' of github.com:qiniu/developer.qiniu.com
update the css for table width bug
index img hover border bug
添加新的社区插件资源。
Merge pull request #103 from BluntBlade/master

添加新的社区插件资源。
添加对Authorization头部所含QBox字符串的说明。
Merge pull request #104 from BluntBlade/master

添加对Authorization头部所含QBox字符串的说明。
Update concepts.md
Update concepts.md
Update concepts.md
Merge pull request #101 from SunLn/7284_table_width_too_large

update the css for table width bug
Merge pull request #102 from SunLn/7287_doc_index_img_hover_border

index img hover border bug
Merge remote-tracking branch 'qiniu/master' into 7172_ADD_Javascript_resource

Conflicts:
	_data/resource.json
	_layouts/homepage.html