libevent: update to libevent-2.0.21-stable
libevent: add patch to support automake-1.13
transmission: update changelog
projects/*/linux: add support for LME2510 USB DVB devices, this fixes #1620

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of https://github.com/OpenELEC/OpenELEC.tv