breadcrumb implementation foudation
add breadcrumb styling
breadcrumb with ui-refs (still buggy)
make last element non clickable
use a root abstract state
Fixed header height
fix home re-routing bug
Send 404 for not found static content
update products images
breadcrumb implementation (done)
Merge branch 'feature/breadcrumb' into develop

Conflicts:
	client/app/app.js
	client/app/controllers/ProductCtrl.js
	client/views/index.jade
	server/server.js
Update text of howitworks page
set breadcrumb for howitworks page
Added favicon.ico and robots.txt to the build
fix typo causing bug in navigation to product details
Update of About Us
adding *.pyc inside .gitignore
Changed "Home" to "Startseite"
Changed Content Structure
Merge branch 'develop' into feature/Customer_Information