Add Tacit's logo image to the top of index page

See #125, release log:

• aa218b4 by @rultor: Merge branch '__rultor'
• 6b7705c by @filfreire: #125 - add tacit logo to top ...
• e49d24d by @filfreire: #124 - add Tacit logo to shor...
• 6d49832 by @filfreire: #88 - added png as binary on ...
• e22fbe9 by @filfreire: #88 - add Tacit logo
• 9a86fe9 by @yegor256: #list: more projets

Released by Rultor 1.67, see build log