Update thelia graphic install
set new thelia logo
set time_limit to 0, because it may reach time limit hint ( 30 sec ) during step 4 and 5
show thelia version in topbar

	modified:   web/install/I18n/en_US.php
	modified:   web/install/I18n/fr_FR.php
	modified:   web/install/header.php
	modified:   web/install/styles.css
Merge pull request #647 from lovenunu/install

Update thelia graphic install