Disabled autocompletion on the datepicker input

Avoid autocompletion of the datepicker input field to occur
(Step to reproduce : Long click on a datepicker input field)

See merge request !141

Update, fix and add breton translation to correct branch



See merge request !143

Install framadate in non empty database

Modifications pour l'issue #187.

See merge request !139

Documentation/composer instruction

Just adding composer instruction for next dev (2 minutes lost ;) 

See merge request !135

PHP5.4 compatibility for empty() function.



See merge request !137

Added escaping for install in config.tpl

In the installation process, string like the one below should be a valid application name (or DB password).
> Framadate c'est vraiment super ! "Datez" comme vous voulez \o/

It missed some escaping for single quote (') and backslash (\\), resulting in PHP parse errors.

It should be cherry-picked to the `release` branch too.

See merge request !136

Readme: added the contributing git branch

Added in the `README.md` from which branch the contributing users can work.

See merge request !133

Add editorconfig file



See merge request !123

License "CeCILL-B" is not a valid SPDX license identifier

Bonjour,

CeCILL-B n'est pas un identifiant SPDX valide, l'identifiant correct est CECILL-B.
C'est un détail mais ça provoque un avertissement de `composer validate`.

See merge request !121

Fix typo in locale/en.json

Hi,  
Just a minor typofix.  
Kind regards.

See merge request !122

Demande de confirmation lors de la supression d'une colonne.



See merge request !119

Empêcher l'ajout de colonne vide

Fix #123 

- Empêche l'ajout de colonne vide
- Permet la suppression des colonnes vides existantes
- Si l'on a une erreur lors de l'ajout de la colonne , on reste sur le formulaire d'ajout
- Correction de la date pour prendre le bon format par rapport a la langue

See merge request !118

Fix date picker

Fix #154

And more Smarty on poll creation

See merge request !115

Improvement - install

A check.php page before install
Updating config.tpl
Verification of config.php creation at install

See merge request !116