Revert 40a7e62..2038fc4

This rolls back to commit 40a7e629142b16e9cb9ab0cbee540fff56730876.
Revert 2038fc4..8468390

This rolls back to commit 2038fc486487b66590ac844e7d2fd117e31685c3.
makes header look good and stable
handles the logo at different sizes
introducing jumbotron as an element
playing around with layout