[FEATURE] #84 Using placeholder for locateByLayer

Like for geocoding search, it will be interesting for user to use placeholder in locateByLayer.
[BUGFIX] #77 Using Alias for the locateByLayer groupBy Field

The implementation added the field alias before the layer's title
[BUGFIX] #85 Hide repository containing only hidden projects

A repository is listed in the main view if it contains at least one project, but some projects are hidden because they are only used as web services or as parent project.

LizMap-Web-Client has to show only repository containing visible projects.
[BUGFIX] #86 Chrome breaks maps web page rendering

This issue also impacts OpenLayers openlayers/openlayers#1181 and Leaftlet Leaflet/Leaflet#2612

The solution is to deactivate 3D chrome effects.
[BUGFIX] #81 - Popups not working on IE

This is an "OpenLayers 2.13" bug because window.ActiveXObject cannot be used.
Add mouse position to map

Commit cherry picked from makina-corpus repository
https://github.com/makinacorpus/lizmap-web-client.git
Mouse position integration

Adding element in the web page, locales and styles.
[FEATURE] #88 Add mouse position select unit

The commits e3f0ec7 and cbf0d33 added mouse position in EPSG:4326.

It will be interesting to also have coordinates in the map's unit, in degrees minutes and in degrees minutes secondes.
Update version to 2.11pre
Add locale el_EL

The localisation has been made by @Arnobzh
[BUGFIX] #89 Locate by layer relational regression

The locate by layer relational features does not correctly filtering lists.
The regression was due to a refactoring.
[BUGFIX] #90 locateByLayer doe not well cleaning input and map with joins

The feature locateByLayer does not well cleaning input and map when the layer has vector joins.

With it, we can add that:
* locateByLayer only use the first vectorjoins
* cascading filtering is not well done
* filtering based on a vectorjoisn and a field are not compatible
* multi-filtering on a same layer cannot be done

Signed-off-by: rldhont <rldhont@gmail.com>
[BUGFIX] #93 Deactivate transition effect for tile layer

Get back to the old OpenLayers layer management
[BUGFIX] #91 Correct link to media files for advanced popup