Added support for 'French' language, updated FireMartZ bio and some updates

[gilardh]

• Added support for 'French' language
• Updated FireMartZ biography in czech, german, hungrian and italian. The biography of FireMartZ remained in english in czech, german, hungrian and italian languages
• Deleting 3 unnecessary links. Three buttons in the 'Documentation' section named 'To be released' send uselessly to the top of the page. The referral has been deleted.
• Delete empty rulesets in 'styles.css' file.
• Fixed some button animations that do not return to their original state. The text of the buttons remains black instead of automatically returning to white.
• Replacing images used on https://bitcointalk.org ads. There are 9 ANN of HUSH in different languages ​​and managed by several people.
• Added 2 pool in the poll list.

See here the support for 'French' language :

See here the bug on button which will be fixed in this commit :

[leto]

This looks good, thanks for fixing the images to our bct ANN :+1: