fix error messages when checking null objects.
Merge pull request #335 from benelog/master

fix error messages when checking null objects.
New Disc cache API
[maven-release-plugin] prepare release v1.8.6
Revert "[maven-release-plugin] prepare release v1.8.6"
[maven-release-plugin] prepare release v1.8.6
[maven-release-plugin] prepare for next development iteration
v1.8.6
Prepare Manifests for next version
Maven: Fixed pom
fix download  unknow  scheme like "HTTP"
Change Locale.getDefault() to Locale.US, us for url is better.
Merge pull request #344 from fatkun/master

Issue #343: Scheme HTTP in uppercase isn't recognized
Fixed visibility of ImageFileInfo and ExifInfo class members.
Pass extra into protected createConnection(...)
Readme: Added apps
Readme: Added apps
Merge branch 'master' of https://github.com/nostra13/Android-Universal-Image-Loader
Reuse input stream during network download to prevent 2 identical network calls
Readme: Added apps