Added a few designer notes
+* Expressions are not supported.
+* Text is not supported.
+* If you have an Illustrator layer, convert it to a shape layer or else it will be exported as a
+bitmap.
+* The smaller the content in a masked or matted layer is, the better the performance will be.
+* Opacity is applied to individual elements not entire layers/groups. This can affect the
+appearance of overlapping items when the group or layer has opacity.
\ No newline at end of file
