[maven-release-plugin] prepare for next development iteration
Add interface for progress callback, closes #9

Also a new demo showcasing the new callback
Combine samples to one
Remove some junk by using Gson instead
Add missing activity to manifest
evictAll() should clear expired as well
Add clear cache button to sample
Remove deprecated use of method
Update DiskLruCache to 2.0.0
Update readme about progress
Only publish progress if not cancelled
Actually check if we are not cancelled
Add flag to skip cache
Add OkHttp to sample
Update DiskLruCache to 2.0.1
Update changelog and readme
[maven-release-plugin] prepare release 1.2.0
Merge tag '1.2.0'