Top bar - show settings in the top right corner

[stefanrinderle]

For the start, we only have the Help, CityBuilder button

• CityBuilder opens the CityBuilder
• Help links to a new tab to http://softvis3d.com/#/details/usage

We should also adjust the usage page of the plugin with this issue. And add more informations to it continuously in the future.

[yvo-niedrich]

• Added Help Button
• Updated style for (all) Buttons

Tested with Chrome, Safari and IE (currently no Firefox installed)

[stefanrinderle]

Looks good. Closed.