[Trusty] fixed #492544
Drop maintaining x11-libs/libXfixes, x11-proto/fixesproto and x11-libs/libXi for Trusty + some pkeywords and pmask maintenance
[Trusty] updated keyword file
Merge remote-tracking branch 'upstream/master'
[Trusty] fixed issue #86. Lock-screen shows Gentoo icon on multi-monitor setup when USE-flag 'branding' set
Version bump for Thunderbird
Merge remote-tracking branch 'upstream/master'