Merge pull request #91 from wangjiezhe/master

rpm v3.5.6-1.fc21 built
v3.5.6-2 built for debian
Add comment about debian 7
Add gtk3 to dependency list
Remove outdated comment
v3.5.6-3 built for debian
Add adwaita-icon-theme to dependency list; https://github.com/LiuLang/bcloud/pull/86#issuecomment-60901932
v3.5.6-3 built for debian
Merge branch 'master' of github.com:LiuLang/bcloud-packages
Adwaita-icon-theme removed
v3.5.7-1 built for debian
rpm v3.5.7-1.fc21 built