Squashed 'core/' changes from 7e49d8d..53acb09

53acb09 Merge branch 'release/0.4.0-alpha'
bcfc429 Add release date
da2632c Update CHANGELOG.md
bf81cd1 Merge branch 'develop' of github.com:syncany/syncany into develop
4afcb66 Merge branch 'feature/issue313-daemon-add-multiple' into develop
adf012b Implements feature request #313
9468625 Update CHANGELOG.md

git-subtree-dir: core
git-subtree-split: 53acb0935a3c77f2e6bc46e59f3f5501eb626e0b
Merge commit '633ff72bc9aef4ef19f99209818909c672aa110f' into develop
Merge branch 'release/plugin-gui/v0.4.0-alpha'
Merge tag 'vplugin-gui/v0.4.0-alpha' into develop

Syncany GUI Plugin v0.4.0-alpha