add info to license.txt

license.txt

@@ -21,8 +21,16 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
-Textures by Amara2_MK (Creative Commons)
+Textures by TenPlus1 (CC0) unless listed below
+
+Textures by Amara2_MK (CC0)
 https://www.curseforge.com/minecraft/texture-packs/glazed-terracotta-revamp
   baked_clay_terracotta*.png
 
 Missing gray, light gray, black and green textures re-coloured by Firefox.
+
+Textures by Timbits (CC-BY-SA 3.0)
+  baked_clay_lazarus.png
+  baked_clay_delphinium.png
+  baked_clay_mannagrass.png
+  baked_clay_thistle.png