Update submodules: plugins (new commits)

plugins:
    45c9ec2 Greg Holmes <greg@dmdirc.com>
            remove (probably) broken user level plugin

            Gerrit: http://gerrit.dmdirc.com/3114

Change-Id: I4e9f90f5b0cbabb355e453ad4d36419d0c174d02
Update submodules: plugins (new commits)

plugins:
    f3c987e Greg Holmes <greg@dmdirc.com>
            Begin DI for web ui

            Gerrit: http://gerrit.dmdirc.com/3117

Change-Id: I58345354e3041520b47897f78337f9ccc381f93f