change .gitignore
Add some customer settings to NetworkImageView:
a. Set default resource and error resource through xml: customer:DefaultRes and customer:ErrorRes.
b. Add fade in feature. It can be set in xml using customer:fadeInDuration or in Java file using setFadeInDuration.
c. Add method setImageUrl(String url, ImageLoader imageLoader, ImageListener imageListener) so that user can do something when the image is loaded.