Implement styleguide in a coherent stylesheet

[andreaslloyd]

Implement Martin's styleguide as a stylesheet for the system:

• add open sans font
• integrate logo in top bar
• define color schemes as defined in the styleguide.

Basically set up templates so that all other pages/views has the same basic appearance.

Reference here: https://dl.dropboxusercontent.com/u/2563453/Eggplant/Styleguide/Styleguide_2015_08_15.pdf

Design files here: https://www.dropbox.com/sh/tjne0xtt2i4guyd/AAD7-O6_ZntHXzr4Ql9eaQRAa?dl=0