removed registry getter
add support for staticpadtemplates

Signed-off-by: Marcin Kolny <marcin.kolny@gmail.com>
gstiterator returns a GValue*

Signed-off-by: Marcin Kolny <marcin.kolny@gmail.com>
add support for g_value holding G_TYPE_LIST

Signed-off-by: Marcin Kolny <marcin.kolny@gmail.com>