Fix: IT Problem page didn't show all related items

In the only_related_to function we only check if
  * tested element have related contact
  * if the source problem have related contact
  * if related impacts have related contact
but we didn't test if host of current critical service have related
contact.

Here I've add the ability to check if host of the service have related
contact and should be displayed.
Add forgotten line
Check for admin
Added: Copyright and version informations
License head update
Add ability to add key/value select widget and set default value

Usage :

        'duration': {
            'value': 'id of selected value',
            'values': {
                'Label Option 1': 'id option 1',
                'Label Option 2': 'id option 2',
                'Label Option 3': 'id option 3',
            },
            'type': 'select',
            'label': 'Global label'
        },
Add duration option
Use duration option in graph
Initial servicetag commit
Merge branch 'master' into develop
More detailed installation instructions

This was my first time with Shinken and I got tripped by the outdated docs on the .org site. Had trouble finding the readthedocs doc (probably because of google indexing) but still the doc there wasn't detailed for a first time module installation (I guess I wouldn't be the only first time installer looking into webui as a first module), had to search in the forum, undesrstand there was some kind of video or tutorial, and finally found more detailed instructions on Naparuba's course's github. How about also updating the shinken.io webui module installation steps!
Update README.md
Merge branch 'iilab-master' into develop
Just a small update of the README
Added: First try of service tags in service view

Issue #62
Changed to static
Merge branch 'develop' into feature-issue67
Improved: Custom company logo Issue #67
Update gitignore to ignore *.db files in Windows
Update map markers with label