OC-2327. New class DownloadRemoteFileOperation
Merge branch 'develop' into refactor_remote_operation_to_download_file
OC-2327: Isolate the code for Download a file
OC-2328: Unit Tests for Download a file
OC-2328: Unit Tests for Download a file:  New DownloadFileTest
Add comment license in some classes
Merge branch 'develop' into refactor_remote_operation_to_download_file
Version up to 1.5.2
Added seasonal icon for winter holidays
Updated hint in URL input field
Dumb update of Jelly Bean workaround app (just version up)
updated SETUP.md for Eclipse compile
made oc_framework a mvn project
updated compile instructions for mvn

oc_framework is a standalone mvn project which must be installed.
if anyone knows how to make oc_framework a submodule without changing the directory structure ... please do it!
[tx-robot] updated from transifex
File with just one chunk use the old non-chunked interface, so that they work in all the servers under 6.0
Removed legacy icons in JB workaround app
Fixed version code in JB workaround app
Fixed propagation of download progress to download notifications
Merge branch 'develop' into refactor_remote_operation_to_download_file
Merge branch 'develop' into refactor_remote_operation_to_download_file