Nemo merge with Nautilus 3.6.3+

This is a systematic merge branch crawling up the Nautilus history to 3.6.3 plus all search fixes. 
It includes all Nemo commits up to now, but without the HIDPI commits, because they break Ubuntu Precise support. While merging, I have tries my best, to keep the nature of Nemo, include all Nemo improvements but skip all controversy discussed commits from Nautilus. 

Features: 
* Search provider: Tracker / Simple / Model 
* Search results are updated during search. 
* Use a ranking algorithm for search results
* Shell search results provider
* Fresh connect to server dialog 
* new search query dialog 
* Add cluebars for Templates and Scripts special directories
* Add a notification while ejecting volumes
* Add a recent files place
* Location bar with Icon 
* Don't pack multiple x-content bars in the view and added icons 
* Add a way to create a new directory for selection
* ... and a lot of small fixes, see https://github.com/daschuer/nemo/blob/nemo_master_merge_nemo_base/NEWS