Readme: Add apps
[maven-release-plugin] prepare release v1.8.4
Revert "[maven-release-plugin] prepare release v1.8.4"

This reverts commit a08f62b8d8e4a4e3daed4c376a4363bb6c19e0a2.
[maven-release-plugin] prepare release v1.8.4
[maven-release-plugin] prepare for next development iteration
v1.8.4
Sample: Use new lib
Prepare Manifests to next version
Fixed ImageSize.toString() (wrong logs)
Issue #247 - Prevent image decoding if image is reused
Clean code
Fixed:
     下载图片失败时没有判断ImageView是否被重用的BUG

增加:
     下载图片的进度回调
Merge remote-tracking branch 'upstream/master'
Fixed:
     更新图片下载进度时,使用handler提交到UI线程执行
     修复图片下载失败时,没有判断ImageView是否重用的BUG