Prepare 1.8.0 release
Add new translations to zh-rCN locale
FR translation; missing strings
Merge pull request #442 from cpasmoi/patch-1

FR translation; missing strings
Merge pull request #439 from jzzhen/master

Add new translations to zh-rCN locale
Add Picasso to dependencies
Add OkHttp to dependencies
Use Picasso for loading avatars