Merge pull request #497 from wmathurin/unstable23

Android implementation of new smartstore action "getDatabaseSize"
Add method to return all headers of RestResponse
Add logging for exception
Log the exception too
Merge pull request #498 from bhariharan/unstable

Add method to return all headers of RestResponse
Merge branch 'unstable' into unstable23
Merge pull request #499 from bhariharan/unstable23

Merge branch 'unstable' into unstable23