Set up base template layout

[henhuy]

With prototype in mind:
Set up base template with header and content blocks.
From there, add one more base templates which inherits from base.html for a different layout where content is divided into left and right (see region today page, whit some data on left side and map on right side).
In the end we should have two base templates:

• base.html with content block
• base_panels.html, inheriting from base.html which splits up content block into content_left and content_right blocks