LiVES 2.8.1 released

ChangeLog

Fix various security issues on multi-user systems - see:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=756565
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=798043

Fix audio length encoding bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=810146

Fix some compilation issues.