Update fish

fish tip:

    commit 14834ff076af7baebd1c02f55a7d3271fbd53600
    Author: ridiculousfish <corydoras@ridiculousfish.com>
    Date:   Mon Dec 29 00:34:36 2014 -0800

        Rename events and simplify signal event handling

        - Rename 'events' to 's_event_handlers'
        - Stop inspecting the s_event_handlers list upon receiving
        a signal. Instead, maintain the set of signals that are observed
        in a separate static array. This lets us avoid mucking with
        STL data structures in a signal handler, and so avoid blocking signals
        in event.cpp
Update libvterm.so

libvterm tip:

    ------------------------------------------------------------
    revno: 626
    revision-id: leonerd@leonerd.org.uk-20141229124853-bkih2fo5p0nbjlj4
    parent: leonerd@leonerd.org.uk-20141229124618-ib0c5dugil52kl8x
    committer: Paul "LeoNerd" Evans <leonerd@leonerd.org.uk>
    branch nick: libvterm
    timestamp: Mon 2014-12-29 12:48:53 +0000
    message:
      Add vterm_*_get_cbdata() to obtain the callback data pointer from each layer
Merge branch 'travis-51.8' into master