add canvas to adherents module

...cs/adherents/canvas/actions_adherentcard_common.class.php

...nts/canvas/default/actions_adherentcard_default.class.php

htdocs/adherents/canvas/default/index.php

.../adherents/canvas/default/tpl/adherentcard_create.tpl.php

...cs/adherents/canvas/default/tpl/adherentcard_edit.tpl.php

...cs/adherents/canvas/default/tpl/adherentcard_view.tpl.php

htdocs/adherents/canvas/default/tpl/index.php

htdocs/adherents/canvas/index.php