Bump version and changelog
Squashed 'core/' changes from e29bb4d..c05fabb

c05fabb Merge branch 'release/0.3.0-alpha'
3fcc3cb Update changelog date for release
7d5b547 Merge branch 'develop' of github.com:syncany/syncany into develop
a448771 Remove obsolete database_name field

git-subtree-dir: core
git-subtree-split: c05fabb1f596d46de71de082184528737d3b9789
Merge commit '53bd386b95e44d86b40fcb05f797cd2022493f9a' into develop
Merge branch 'release/plugin-sftp/v0.3.0-alpha'
Merge tag 'vplugin-sftp/v0.3.0-alpha' into develop

Syncany SFTP Plugin v0.3.0-alpha