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Added
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* Add Django 1.10 support
* Add support of gitlab continuous integration
Fixed
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* Fix BootsrapForm: placeholder on Input and Textarea only, use class form-control on
Input, Select and Textarea.
* Fix lang attribute in django 1.7. On html pages, the lang attribute of the <html> was not
present in django 1.7. We use now a methode to display it that is also available in django 1.7