fix tribler.sh
Passing Notifier subject to Notifier-Timer name
Check for downloadstate, if exists check for progress
Return 410 if httpserver is shutdown
Videoplayer change
Fixes for Notifier being called from the wrong thread + fix for
my_channel test
Fixes problem with CallConditional crashing because of an exception
being thrown by condition()
Maybe closing immediately after the videoplayer starts playing causes
the segfault
Fixed VODFile lock
No more printing of the piece hashes
Add seeder peer after 5 seconds
Added comments for DB upgrade from v18 to v19.
Removed an unnecessary variable.
Removed an unnecessary variable 'check_version'.
Removed some redundant logic and code.
Removed a redundant lock.
Small clean up.
Removed constant 'NULL'.
Fix lock problem.
Fix import NULL.