fgm/drupal_module__splash: Provide a splash screen on Drupal.

Frédéric G. MARAND 3471257283 First commit (actually 2015/01/10).		10 lat temu
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SettingsForm.php	3471257283 First commit (actually 2015/01/10).	10 lat temu
SplashBlock.php	3471257283 First commit (actually 2015/01/10).	10 lat temu