Avoided ImageLoader.getInstance() usages in the code (#158)
Extracted ImageLoaderEngine from ImageLoader.
Changed API: PauseOnScrollListener requires ImageLoader instance in
constructor
Added support of "content://", "assets://", "drawable://" schemes for
image URIs from the box. Included ExtendedImageDownloader into the
library, use it as default downloader.
Sample: Removed local ExtendedImageDownloader, use one from the library.
Use new API of PauseOnScrollListener
Sample: Use the latest lib snapshot
Changed API: Removed context reference from ImageLoader.loadImage(...)
parameters. Keep app context in configuration.
Sample: Used new API of ImageLoader.loadImage(...)
Fixed Java docs
Renamed FileUtil -> IoUtil. Close all streams silently.
Clean code
Introduced DiscCacheUtil
Not process images from FTP by default.
Made FlushedInputStream buffered
Sample: Clean code
Recycle old bitmap in RoundedBitmapDisplayer
Java docs
Introduced `DisplayImageOptions.preProcessor(...)` and
`postProcessor(...)`. Added `ProcessAndDisplayImageTask`.
Revert "Recycle old bitmap in RoundedBitmapDisplayer"

This reverts commit bcde84ac96e239ca1299a86676b30c4b625a8ff3.
Java docs
Fixed versions in manifests
Clean code