Improved: Dashboard

Short metrics overview
Fixed: dashboard metrics possition
Merge branch 'master' into develop
Tidy up!
Fixed: Backgroud colour currently view
Deleted: Unused items
Added: more comments
Improved: Widget Header
Added: Licensen header
Deleted: Unused file
Merge branch 'master' into develop
Fix javascript error
First column alignment in system status display

Set fixed width for Name column for that table global alignment is nicer
...
Element detail view

Improvements :
- use host display_name if exists (#38)
- improve element information
- display long_output for check result
- active/passive checks in additional information
Copyright 2014 in footer element
Added Shinken logo on login page

Large logo for standard login page and small logo for mobile login page
Host groups overview page

Issue # 41
- item in main menu leads to hostgroups overview page
- each group displays Up / Down / Unreachable / Pending hosts count
- clicking on a group Details leads to a detailed group view
Fixed: Issue #40
Deleted: Unused lines
Same as last commit with changes