Made improvements by @jameswatts + some more

Renamed "Source Code Repositories @ GitHub" to "Source Code"
Moved News on top of the list.

Also grouped the menu items in Community logically.
Moved Logo to Resources

https://github.com/cakephp/csfnavbar/pull/2/files#r5762081
https://github.com/cakephp/csfnavbar/pull/2/files#r5762206