Moved main menu to right side of app bar.
Moved filter tabs into a separate sidebar toolbar.

The sidebar content is now kept in a card too.
Started to redraw LOOT icon as SVG.

Following the Material Design guidelines as best I can.
More progress on SVG icon.

However, it looks rubbish when scaled down, so I'm going to try some
things for that.
Fixed icon looking rubbish when scaled down.

The yellow isn't a good edge material, it goes invisible against white
when the icons are too small to have noticeable shadows.
Generated ico file for new icon.
Revert "Moved filter tabs into a separate sidebar toolbar."

This reverts commit b5756c56b7ff9d655adc0c59a35038759729edd2.
Re-implemented tabs in separate sidebar.

No more huge CPU usage.
Hack for sidebar plugin list being sized too small.
Tooltips no longer show arrows.

For better matching the Material Design spec. It looks better too, and
avoids the issue with the arrows being in the wrong place.
Added drop shadow to header toolbar.
Improved editor layout.

Tabs are now part of the toolbar, the priority and enable edits controls
are in a "Main" tab, and the accept/cancel buttons have been made icon
buttons and moved into the toolbar.
Use core-dropdown fix repo in bower config.

I'm getting some version requirement conflicts, as the core-list and
core-dropdown fixes are off Polymer's master branches, and not the 0.5.1
tag.
Removed Vulcanize bug warning from README.

As of v0.7.1, it's no longer a problem.
Merge branch 'material-design' into dev