Bugfix.
Added a comment about fat arrow (=>).
Clearer installation wizard.
Moved caching to jobs.
Moved arXiv metadata to jobs.
Upgrade to use exists query.
Merge branch 'development' into tasks

Conflicts:
	smart.lock
New milestones URL.
Improvements to jobs internal API.

Skipping jobs if they are exist when enqueuing.
Import overlay design. Fixes #513
Select import files in overlay. Fixes #572
Import design improvements.
Minor import overlay design changes.
Code for exiting on startup is now in PeerLibrary.

Exiting on startup is used in tests and building images. It is used so that you can run PeerLibrary to installs all dependencies, but then exit.
Fixed javascript error.
Error introduced by manual merge @0a9d1858ef. Conflict not resolved
properly.
Merge pull request #581 from peerlibrary/accounts-javascript-bugfix

Fixed javascript error in accounts.coffee.
Access buttons on import. Also fixes #528
Better click handling in import overlay.
Design bug fix on meta menu access control.
Comment clarification in imports.