Neoplatonic Texts in Turkey: Two Manuscripts, Containing Ibn Tufayl's 'Hayy Ibn Yaqzan,' Ibn al-Sid's 'Kitab al-Hada'iq,' Ibn Bajja's 'Ittisal al-'Aql bi-l-Insan,' the 'Liber de causis' and an Anonymous Neoplatonic Treatise on Motion