Add simple default constructors for model loaders
Fix receiving old cancellations in new jobs

Conflicts:
	library/src/com/bumptech/glide/resize/ImageManager.java
Fix a strict mode violation opening disk cache.

Fixes #67
Enable strict mode logging in flickr sample.
Bump version
Merge branch 'master' into 3.0a

Conflicts:
	library/AndroidManifest.xml
	library/src/com/bumptech/glide/loader/model/FileLoader.java
	library/src/com/bumptech/glide/loader/model/ResourceLoader.java
	library/src/com/bumptech/glide/loader/model/StringLoader.java
	library/src/com/bumptech/glide/loader/model/UriLoader.java
	library/src/com/bumptech/glide/resize/ImageManager.java
	library/src/com/bumptech/glide/resize/cache/DiskLruCacheWrapper.java
	samples/flickr/src/com/bumptech/glide/samples/flickr/FlickrSearchActivity.java