[DOC] Updated hands-on for meetings and conferences
[FIX] Download material package list fix

* fixed contribution scheduled on date filter
* fixed session filter
* material types genearation based on event
[FIX] Apply PEP8 on ConferencePacker class

* closes #1156
[FIX] Moved material list rendering to tpl

 * see #1156
[FIX] Shift is pressed tip in TT display event

* check if management mode is enable
* closes #1162
[VER] Updated download URL
[VER] Uploaded GPL version in setup.py
[FIX] Contribution deleted crash video indexes

- Closes #1167
[FIX] HTTP API - No occurrences for empty days
[FIX] Buggy "Linked to" display
[FIX] Refactored method
[FIX] Fix submit protected material
[FIX] Delete contribution

- Unindex from Webcast/Recording when it has startDate.
[FIX] Add inheritance control to domain protection

 * It is currently using inheritance all the time, even if the event is public by itself;
[FIX] Room Booking confirm booking
[FIX] Conference Announcement activation
[FIX] Cloning given days starting september
[FIX] Resource list material deleted exception
[FIX] Do not fail when no Collaboration
[FIX] Fixed getOrphans() SQL query

 * Requested by Nicola;