This update adds the possibility to programmatically visit and snapshot multiple pages; e.g. all pages that are listed in a table of contents (select the links, right-click and choose "snapshot linked pages").

Also, it updates the 'freeze-dry' module it uses internally to make snapshots, which fixes some errors.

Add an options page with:
- a button to download all snapshots from IndexedDB to the downloads folder.
- a checkbox to have every new snapshot also be saved in the downloads folder.

Changes in v0.3.1:
- Support opening a snapshot in a new tab.
- If storing to IndexedDB fails, fall back to directly downloading the snapshot.

Changes in v0.3.0:
- Thoroughly simplify code base
- Abandon ambitions for full history logging, smart deduplication, etcetera.
- Drop half-implemented support for pdf documents (we made them searchable, but did not save them)
- Drop support for searching through address-/omni-/awesome-bar. Did not seem worth maintaining.
- Change popup behaviour
- Open snapshots in the current tab
- Show (other) snapshots when viewing a snapshot
- Consistently show both 'save as' and delete button at every place that had either.
- Fix 'save as' when invoked from the popup (was broken in Firefox)
- Turn overview into a grid layout
- Updated freeze-dry: store provenance metadata inside the snapshot file, parse css properly, etc.

just some dependency fixes.

Now also captures content inside frames, after a full rewrite of the underlying freeze-dry code.

Change popup interaction; it now lists previous snapshots of the viewed page.
Also some small fixes.

Small design tweaks and technical fixes.