allow callers to specify their own Handler
Merge pull request #231 from mlc/custom_handler

Introduce DisplayImageOptions.handler()
Java docs
Issue #229 - ConcurrentModificationException
Issue #234 - NPE in LimitedDiscCache
Travis CI support
Issue #189 - Add Unit Tests
Built new snapshot
Readme: added apps, Flattr
Clean imports
Update Readme
Issue #233 - NPE in LruMemoryCache if pre-processor returns null
Refactored LOG constants
Fixed Readme
Built new snapshot
Merge branch 'master' of https://github.com/nostra13/Android-Universal-Image-Loader

Conflicts:
	library/src/com/nostra13/universalimageloader/cache/disc/LimitedDiscCache.java
	library/src/com/nostra13/universalimageloader/core/DisplayImageOptions.java
	library/src/com/nostra13/universalimageloader/core/LoadAndDisplayImageTask.java