ctx https://github.com/gre/react-native-view-shot/issues/67

As per owner's suggestion:
Firstly get all children recursively;
Then check if each child is an instance of TextureView with instanceof;
Make sure child knows it's not opaque and get its bitmap into a buffer;
Draw said bitmap into the current canvas.

This assumes that these TextureView elements are ordered in the tree.

#34

1.evaluated the real height when the isScrollView is true
2.upgrade README.md

This reverts commit 45061cc62a.

I was actually wrong on this.

Fixes #15

my problem i was having is you can't do new File(uri) but it's normal, it's not a file path, it's a Uri,
if you are sure you have a file uri, you can do new File(Uri.parse(uri).getPath()) but I guess best is to get a input stream from the Uri or keep using Uri..

This reverts commit a85cf9629a.