Correcting comment typo in file header

Fix #190 

See merge request !144

Feature - better markdown for description

The description of the poll now has full markdown support:
- Use of ParseDown PHP library to parse markdown
- Use of SimpleMDE JS library to have an more confortable editor
- Possibility to switch from rich editor to simple textarea editor
- Possibility to configure default editor in application
- Small refactoring of adminstuds javascript

See merge request !132

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

    - Ajout d'un editeur de markdown
    - On garde le formattage des espaces
    - On empeche l'utilisateur de mettre du html