~bryce/xchat-gnome/cherrypicks

* Merge with Debian unstable, remaining changes: (LP: #773847)
  - debian/control:
    - add Build-Depends on liblaunchpad-integration-dev.
    - xchat-gnome Suggests: xchat-gnome-indicator.
  - debian/patches/02_lpi.patch: add Launchpad integration items to the help
    menu
  - debian/patches/10_xchat-gnome-close-event.patch: add events for window
    close.
  - debian/patches/04_autojoin_ubuntu_chan.patch: add the Ubuntu network
    as default selection and default to autojoining #ubuntu.
  - debian/patches/20_add_gui_focus.patch: implement GUI focus from XChat.
  - debian/patches/51_freenode_default_port_8001.patch: Drop ports 666x
    for FreeNode to workaround a possible DCC exploit.
  - debian/patches/95_apturl-support.patch: support apt://-urls.
  - debian/watch: also look for unstable versions
  - debian/xchat-gnome.gconf-defaults: Set the default enabled plugins,
    indicator, netmonitor, and notifyosd.
* debian/patches/52_no_zero_width_pixmaps.patch: dropped, applied upstream.
* debian/patches/98_ice_depends_for_eggsmclient.patch: replaced by
  01_link_libice.patch.
* debian/control: remove duplicate entry in Build-Depends for intltool.
* debian/xchat-gnome.install: also install the xchat-gnome.desktop file from
  /usr/share/applications in xchat-gnome rather than xchat-gnome-common.
  (LP: #374686)
* debian/rules: update the xchat-gnome-common binary-install target to not
  keep a duplicate copy of the xchat-gnome.desktop file.