Squashed 'core/' changes from e0645a9..ca1916c

ca1916c Merge branch 'release/0.1.3-alpha'
568bbe4 Correct changelog release date
8f78e55 Deactivate removeLostMultiChunks() as workaround for #132
2659fbd Merge branch 'develop' of github.com:syncany/syncany into develop
09de91e Remove order or cleanup (workaround for #58)
4a2cbfe Update CHANGELOG.md
a4154a2 Changelog update
9d98b7c Merge branch 'develop' of github.com:syncany/syncany into develop
563bcbb Merge branch 'feature/actions' into develop
6952704 Delete temp action files
ae8274b Documentation
4a0a5ae Update CHANGELOG.md
f009c72 Implements deletion of old ActionRemoteFiles of other clients after 8 minutes; relates to #64
7eec496 Implements action renewal every 2 minutes
5733ef0 Move operations to their own packages
a5278e3 Test for actions; relates to #64
54a9f23 Add working removeLostMultiChunks() to CleanupOperation; not sure about the semantics of cleanup though
1b2090a First attempt to delete unused remote multichunks; not working
7ffb398 Move CleanupOperation to its own package.
daf2fa2 Introducing the ActionRemoteFile to prevent cleanup during up/down; works for local plugin; relates to #64
ebc7ae7 Merge branch 'release/0.1.2-alpha'

git-subtree-dir: core
git-subtree-split: ca1916c1ce2cdbf6a4266991759a1a0968a47171
Merge commit '09f6f1922cda6f547c32941578e438ddaedbc9a5' into develop
Bump version; add actions file support