Upgrade to Polymer 1.0

[balloob]

This pull request contains the upgrade of the frontend from Polymer 0.5.5 to Polymer 1.0. It is only a port to make it work with the slightly changed syntax introduced by Polymer 1.0. No new features will be added.

This pull request is a work in progress.

Tasks:

• Entry point
• Login form
• Sidebar
• State list
• History
• Logbook
• Developer tools: events
• Developer tools: services
• Developer tools: states
• More info dialogs
• Notifications

Bugs:

• State partial header toolbar is not fully shown if content exceeds screen
• Dev tools data binding is broken making forms unusable
• States partial: Background color
• Sidebar menu items show wrong mouse cursor
• Menu button does not work when sidebar is collapsed
• Styling of more info dialog is off
• Clicking on a toggle inside a more info dialog closes dialog
• Conditional hiding of supported controls in more info dialogs is not working
• Sidebar does not auto collapse on small screens
• Roboto Font reference lost while vulcanizing

Nice to fix but no show stoppers:

• More info dialog transition is broken
• Sidebar menu does not stretch whole screen
• Minify HTML again using HTML minifier