Lizmap-Web-Client - Release version 2.10.0

Changelog - 2.10.0
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Localization:

* Portuguese
* Greek

Baselayer:

* Empty baselayer
* IGN Geoportail

Tools:

* Google Map search
* Enhance print capabilities
* min length in combobox
* WFS proxy
* Add attribution based on GetCapabilities layer description

Configuration :

* publishing layer not displayed in layer switcher
* defining map web page theme

Bugfixes : https://github.com/3liz/lizmap-web-client/compare/release_2_9...release_2_10